c

Definitions of c
  1. noun
    the 3rd letter of the Roman alphabet
    synonyms: C
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    type of:
    alphabetic character, letter, letter of the alphabet
    the conventional characters of the alphabet used to represent speech
  2. adjective
    being ten more than ninety
    synonyms: 100, hundred, one hundred
    cardinal
    being or denoting a numerical quantity but not order
  3. noun
    the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second
    synonyms: light speed, speed of light
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    type of:
    constant
    a number representing a quantity assumed to have a fixed value in a specified mathematical context
    speed, velocity
    distance travelled per unit time
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