A distinct period or stage in a process of change or forming part of something’s development
the final phase of the campaign
Of or relating to electrical signals that are in phase
Being or happening in (or out of) synchrony or harmony
A gradual introduction.
(Of an electric generator, motor, or other device) designed to supply or use simultaneously two separate alternating currents of the same voltage, but with phases differing by half a period
A genetic or seasonal variation in the color of the skin, pelt, or feathers of an animal
An angle representing a difference in phase, 360 degrees (2π radians) corresponding to one complete cycle
A curve representing the relationship of a variable and the phase of something.
A gradual reduction, a planned decrease.
A delimited area in a phase diagram representing a distinct equilibrium condition, especially of a metal alloy system.
Fix the frequency of (an oscillator or a laser) relative to a stable oscillator of lower frequency by a method that utilizes a correction signal derived from the phase difference generated by any shift in the frequency
A plane in which the changing state of a system over time may be plotted with reference to two variables; a two-dimensional phase space.
A rule relating the possible numbers of phases, constituents, and degrees of freedom in a chemical system
A change in the phase of a waveform
A multidimensional space in which each axis corresponds to one of the coordinates required to specify the state of a physical system, all the coordinates being thus represented so that a point in the space corresponds to a state of the system
(Of an induction motor) having a secondary circuit in the form of windings.
Denoting or relating to an induction motor or other device utilizing two or more voltages at different phases produced from a single-phase supply
(Of an electric generator, motor, or other device) designed to supply or use simultaneously three separate alternating currents of the same voltage, but with phases differing by a third of a period
= mirror stage.
A fluid phase; (specifically in chromatography) the liquid or gas phase which carries the sample by diffusion through the stationary, adsorbing medium.
A temporary situation or trend; specifically a temporarily difficult or unhappy period, especially in the life of an adolescent.
= phase shift.
= phase converter.
A diagram representing the limits of stability of the various phases in a chemical system at equilibrium, with respect to variables such as composition and temperature
A circuit, device, etc., which introduces a change in the phase of an oscillation or waveform; (Electrical Engin.) a transformer which alters the power factor in an A.C. circuit by changing the phase relationship of voltage and current.
A circuit or device which changes the phase of one signal relative to another; (Music) a circuit in one of a pair of pick-ups on an electric guitar, which puts the pick-ups out of phase with one another and alters the sound.
The second of four stages of human sexual response identified by William Masters, in which there is a period of intense sexual excitement lasting a variable but usually short time following a longer phase of increasing excitement and succeeded either by orgasm or by a longer period of decreasing excitement.
= reversed phase.
A device for advancing the phase of a waveform, signal, etc.; (Electrical Engin.) a device for increasing the power factor of an induction motor by generating a magnetizing current in the rotor circuit which leads the main rotor current in phase.
The technique in microscopy of introducing a phase difference between parts of the light supplied by the condenser so as to enhance the outlines of the sample, or the boundaries between parts differing in optical density
A device which converts an alternating current into one having a different number of phases but the same frequency.
A phase splitter which produces two signals 180 degrees out of phase.
To modulate or vary the phase of (a radio or other wave).
Of a radio signal or other waveform: varied in respect of its phase.
The set of all possible curves in a phase plane or phase space describing the changing state of a system over time (different curves corresponding to different initial conditions).
A chemical or physical change which involves the transfer of material between phases, or the appearance or disappearance of a phase.
A rotation or cycling of the phase of a waveform; (Electrical Engin.) = phase sequence.
Sensitive to the phase of a vibration, current, etc.; (of a detector or other device) producing an output that is proportional to the phase difference between an input and a reference signal.
A sequence of phases; (Electrical Engin.) the order in which the different components of a polyphase system pass through the same phase.
That causes or introduces a shift in the phase of an oscillation, waveform, etc.; that acts as a phase shifter.
A circuit or device which splits a single-phase voltage into two or more voltages differing in phase.
Designating a circuit or device which splits a single-phase voltage into two or more voltages differing in phase.
The speed of propagation of a sine wave or a sinusoidal component of a complex wave, equal to the product of its wavelength and frequency
Designating a type of liquid chromatography in which the stationary phase is non-polar and the moving phase is a polar solvent, causing molecules to migrate in order of polarity, with the most polar migrating fastest.
A difference in phase between two alternating electrical currents or other waveforms.
Distortion involving change in the phase relations of the components of a waveform, caused especially by a difference in the speed of propagation for different frequencies.
A phase-contrast microscope.