fundamental quantity

Definitions of fundamental quantity
  1. noun
    one of the four quantities that are the basis of systems of measurement
    synonyms: fundamental measure
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    temperature
    the degree of hotness or coldness of a body or environment (corresponding to its molecular activity)
    mass
    the property of a body that causes it to have weight in a gravitational field
    length
    the linear extent in space from one end to the other; the longest dimension of something that is fixed in place
    period, period of time, time period
    an amount of time
    absolute temperature
    temperature measured on the absolute scale
    absolute zero
    (cryogenics) the lowest temperature theoretically attainable (at which the kinetic energy of atoms and molecules is minimal); 0 Kelvin or -273.15 centigrade or -459.67 Fahrenheit
    Curie point, Curie temperature
    the temperature above which a ferromagnetic substance loses its ferromagnetism and becomes paramagnetic
    dew point
    the temperature at which the water vapor in the air becomes saturated and condensation begins
    flash point, flashpoint
    the lowest temperature at which the vapor of a combustible liquid can be ignited in air
    freezing point, melting point
    the temperature below which a liquid turns into a solid
    boil, boiling point
    the temperature at which a liquid boils at sea level
    mercury
    temperature measured by a mercury thermometer
    room temperature
    the normal temperature of room in which people live
    simmer
    temperature just below the boiling point
    blood heat, body temperature
    temperature of the body; normally 98.6 F or 37 C in humans; usually measured to obtain a quick evaluation of a person's health
    cold, coldness, frigidity, frigidness, low temperature
    the absence of heat
    heat, high temperature, hotness
    the presence of heat
    body
    the main mass of a thing
    biomass
    the total mass of living matter in a given unit area
    critical mass
    the minimum mass of fissionable material that can sustain a chain reaction
    rest mass
    (physics) the mass of a body as measured when the body is at rest relative to an observer, an inherent property of the body
    relativistic mass
    (physics) the mass of a body in motion relative to the observer: it is equal to the rest mass multiplied by a factor that is greater than 1 and that increases as the magnitude of the velocity increases
    bulk
    the property possessed by a large mass
    gravitational mass
    (physics) the mass of a body as measured by its gravitational attraction for other bodies
    inertial mass
    (physics) the mass of a body as determined by the second law of motion from the acceleration of the body when it is subjected to a force that is not due to gravity
    atomic mass, atomic weight, relative atomic mass
    (chemistry) the mass of an atom of a chemical element expressed in atomic mass units
    mass energy
    (physics) the mass of a body regarded relativistically as energy
    molecular weight, relative molecular mass
    (chemistry) the sum of the relative atomic masses of the constituent atoms of a molecule
    circumference
    the length of the closed curve of a circle
    diam, diameter
    the length of a straight line passing through the center of a circle and connecting two points on the circumference
    r, radius
    the length of a line segment between the center and circumference of a circle or sphere
    longness
    the property of being of long spatial extent
    shortness
    the property of being of short spatial extent
    mass defect, mass deficiency
    the amount by which the mass of an atomic nucleus is less than the sum of the masses of its constituent particles
    test period, trial period
    a period of time during which someone or something is tested
    time frame
    a time period during which something occurs or is expected to occur
    hours
    an indefinite period of time
    downtime
    a period of time when something (as a machine or factory) is not operating (especially as a result of malfunctions)
    uptime
    a period of time when something (as a machine or factory) is functioning and available for use
    work time
    a time period when you are required to work
    time off
    a time period when you are not required to work
    bout
    a period of illness
    hospitalisation, hospitalization
    a period of time when you are confined to a hospital
    travel time
    a period of time spent traveling
    times
    a more or less definite period of time now or previously present
    time
    an indefinite period (usually marked by specific attributes or activities)
    elapsed time
    the time that elapses while some event is occurring
    continuance, duration
    the period of time during which something continues
    calendar week, week
    a period of seven consecutive days starting on Sunday
    midweek
    the middle of a week
    field day
    a time of unusual pleasure and success
    life, life-time, lifespan, lifetime
    the period during which something is functional (as between birth and death)
    life
    the period between birth and the present time
    life
    the period from the present until death
    millenary, millennium
    a span of 1000 years
    bimillenary, bimillennium
    a span of 2000 years
    occupation
    the period of time during which a place or position or nation is occupied
    past
    a earlier period in someone's life (especially one that they have reason to keep secret)
    shelf life
    the length of time a packaged food or drug will last without deteriorating
    puerperium
    time period following childbirth when the mother's uterus shrinks and the other functional and anatomic changes of pregnancy are resolved
    lactation
    the period following birth during which milk is secreted
    time of life
    a period of time during which a person is normally in a particular life state
    calendar day, civil day
    a day reckoned from midnight to midnight
    festival
    a day or period of time set aside for feasting and celebration
    day, daylight, daytime
    the time after sunrise and before sunset while it is light outside
    forenoon, morn, morning, morning time
    the time period between dawn and noon
    dark, night, nighttime
    the time after sunset and before sunrise while it is dark outside
    night
    the time between sunset and midnight
    night
    the period spent sleeping
    night
    a period of ignorance or backwardness or gloom
    eve
    the period immediately before something
    evening
    the early part of night (from dinner until bedtime) spent in a special way
    hebdomad, week
    any period of seven consecutive days
    fortnight, two weeks
    a period of fourteen consecutive days
    weekend
    a time period usually extending from Friday night through Sunday; more loosely defined as any period of successive days including one and only one Sunday
    Indian summer, Saint Martin's summer
    a period of unusually warm weather in the autumn
    year
    the period of time that it takes for a planet (as, e.g., Earth or Mars) to make a complete revolution around the sun
    school, school day, schooltime
    the period of instruction in a school; the time period when school is in session
    twelvemonth, year, yr
    a period of time containing 365 (or 366) days
    year
    a period of time occupying a regular part of a calendar year that is used for some particular activity
    semester
    half a year; a period of 6 months
    bimester
    a period of 2 months
    Olympiad
    one of the four-year intervals between Olympic Games; used to reckon time in ancient Greece for twelve centuries beginning in 776 BC
    lustrum
    a period of five years
    decade, decennary, decennium
    a period of 10 years
    century
    a period of 100 years
    quadrennium
    a period of four years
    quinquennium
    a period of five years
    half-century
    a period of 50 years
    quarter-century
    a period of 25 years
    quarter
    a fourth part of a year; three months
    phase of the moon
    a time when the Moon presents a particular recurring appearance
    day
    the period of time taken by a particular planet (e.g. Mars) to make a complete rotation on its axis
    calendar month, month
    one of the twelve divisions of the calendar year
    mid-January
    the middle part of January
    mid-February
    the middle part of February
    mid-March
    the middle part of March
    mid-April
    the middle part of April
    mid-May
    the middle part of May
    mid-June
    the middle part of June
    mid-July
    the middle part of July
    mid-August
    the middle part of August
    mid-September
    the middle part of September
    mid-October
    the middle part of October
    mid-November
    the middle part of November
    mid-December
    the middle part of December
    time limit
    a time period within which something must be done or completed
    term
    a limited period of time
    trimester
    a period of three months; especially one of the three three-month periods into which human pregnancy is divided
    hour
    a special and memorable period
    silly season
    a time usually late summer characterized by exaggerated news stories about frivolous matters for want of real news
    Golden Age
    (classical mythology) the first and best age of the world, a time of ideal happiness, prosperity, and innocence; by extension, any flourishing and outstanding period
    silver age
    (classical mythology) the second age of the world, characterized by opulence and irreligion; by extension, a period secondary in achievement to a golden age
    bronze age
    (classical mythology) the third age of the world, marked by war and violence
    iron age
    (classical mythology) the last and worst age of the world
    Platonic year, great year
    time required for one complete cycle of the precession of the equinoxes, about 25,800 years
    regulation time
    (sports) the normal prescribed duration of a game
    extra time, overtime
    playing time beyond regulation, to break a tie
    season, time of year
    one of the natural periods into which the year is divided by the equinoxes and solstices or atmospheric conditions
    canicular days, canicule, dog days
    the hot period between early July and early September; a period of inactivity
    midwinter
    the middle of winter
    season
    a recurrent time marked by major holidays
    season
    a period of the year marked by special events or activities in some field
    age, long time, years
    a prolonged period of time
    long haul, long run
    a period of time sufficient for factors to work themselves out
    drought, drouth
    a prolonged shortage
    epoch, era
    a period marked by distinctive character or reckoned from a fixed point or event
    generation
    the normal time between successive generations
    prehistoric culture, prehistory
    the time during the development of human culture before the appearance of the written word
    reign
    a period during which something or somebody is dominant or powerful
    run
    the continuous period of time during which something (a machine or a factory) operates or continues in operation
    early days, youth
    an early period of development
    dawn
    an opening time period
    evening
    a later concluding time period
    time
    a period of time considered as a resource under your control and sufficient to accomplish something
    nap, sleep
    a period of time spent sleeping
    lease, term of a contract
    the period of time during which a contract conveying property to a person is in effect
    half life, half-life
    the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate)
    lunar time period, tide
    there are usually two high and two low tides each day
    phase, stage
    any distinct time period in a sequence of events
    multistage
    occurring in more than one stage
    watch
    the period during which someone (especially a guard) is on duty
    peacetime
    a period of time during which there is no war
    wartime
    a period of time during which there is armed conflict
    duty tour, enlistment, hitch, term of enlistment, tour, tour of duty
    a period of time spent in military service
    honeymoon
    the early (usually calm and harmonious) period of a relationship; business or political
    indiction
    a 15-year cycle used as a chronological unit in ancient Rome and adopted in some medieval kingdoms
    prohibition, prohibition era
    the period from 1920 to 1933 when the sale of alcoholic beverages was prohibited in the United States by a constitutional amendment
    incubation period
    the period between infection and the appearance of symptoms of the disease
    rainy day
    a (future) time of financial need
    noviciate, novitiate
    the period during which you are a novice (especially in a religious order)
    bloom, blossom, efflorescence, flower, flush, heyday, peak, prime
    the period of greatest prosperity or productivity
    running time
    the length of time that a movie or tv show runs
    clotting time
    the time it takes for a sample of blood to clot; used to diagnose some clotting disorders
    air alert
    the time period during which military and civilian agencies are prepared for an enemy air attack
    question time
    a period during a parliamentary session when members of British Parliament may ask questions of the ministers
    real time
    (computer science) the time it takes for a process under computer control to occur
    real time
    the actual time that it takes a process to occur
    study hall
    a period of time during the school day that is set aside for study
    usance
    the period of time permitted by commercial usage for the payment of a bill of exchange (especially a foreign bill of exchange)
    window
    the time period that is considered best for starting or finishing something
    limbo
    a period of prolonged uncertainty
    vintage
    the period or time when something was produced
    type of:
    amount, measure, quantity
    how much there is or how many there are of something that you can quantify
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