- Types:
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form, phase
(physical chemistry) a distinct state of matter in a system; matter that is identical in chemical composition and physical state and separated from other material by the phase boundary
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liquid, liquid state, liquidity, liquidness
the state in which a substance exhibits a characteristic readiness to flow with little or no tendency to disperse and relatively high incompressibility
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solid, solid state, solidness
the state in which a substance has no tendency to flow under moderate stress; resists forces (such as compression) that tend to deform it; and retains a definite size and shape
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gas, gaseous state
the state of matter distinguished from the solid and liquid states by: relatively low density and viscosity; relatively great expansion and contraction with changes in pressure and temperature; the ability to diffuse readily; and the spontaneous tendency to become distributed uniformly throughout any container
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plasma
(physical chemistry) a fourth state of matter distinct from solid or liquid or gas and present in stars and fusion reactors; a gas becomes a plasma when it is heated until the atoms lose all their electrons, leaving a highly electrified collection of nuclei and free electrons
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interplanetary gas
a rarefied flow of gas and charged particles (plasma) that stream from the sun and form the solar wind
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dispersed particles, dispersed phase
(of colloids) a substance in the colloidal state
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dispersing medium, dispersing phase, dispersion medium
(of colloids) a substance in which another is colloidally dispersed
