PHASE

A 'phase' is one point or portion in a recurring series of changes. 'Phase' or 'phases' may also refer to:
In 'science and engineering':

★ Phase (matter), a physically distinctive form of a substance, such as the solid, liquid, and gaseous states of ordinary matter

★ Phase (systems), in a complex system, a behaviour that emerges from the interactions of components at a small scale

★ The initial condition of a cyclic phenomenon

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★ Phase (waves), initial angle of a sinusoid function at its origin

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★ Continuous Fourier transform, angle of a complex coefficient representing the phase of one sinusoidal component

★ The current (time varying) state of a cyclic phenomenon

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★ Lunar phase, the appearance of the Moon as viewed from the Earth

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★ Planetary phase, the appearance of the illuminated section of a planet

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★ Instantaneous phase, generalization for both cyclic and non-cyclic phenomena

★ Phase factor, a complex scalar in the context of quantum mechanics

★ Polyphase system, a means of distributing alternating current electric power in multiple conducting wires with definite phase offsets

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★ Single-phase electric power

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★ Three-phase electric power Basics of three-phase electric power

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★ Three-phase Mathematics of three-phase electric power

★ In biology, a part of the cell cycle in which cells divide and reproduce

★ Phaser (effect), an audio effect.
In 'fiction':

★ "Phases" (''Buffy'' episode), an episode of the TV series ''Buffy the Vampire Slayer''

★ Phases (.hack), fictional boss monsters from the .hack franchise

★ Phase, an incarnation of the DC Comics character usually known as Phantom Girl

★ Phase IV, a 1974 science fiction movie directed by Saul Bass
'Other':

★ Phase (syntax), a syntactic domain hypothesized by Noam Chomsky

★ Phase 10, a card game created by Fundex Games
'See also':

★ Faze

★ Phaser

★ Phasor