phase¹ /fāz/

1. (also phasis /fāˈsis/) a stage in growth or development (lit and figurative)
2. The aspect or appearance of anything at any stage
3. The stage of advancement in a periodic change, measured from some standard point
4. The appearance at a given time of the illuminated surface exhibited by the moon or a planet
5. A homogenous part of a chemical system separated from other parts by distinct boundaries (chem)
6. The sum of all those portions of a material system which are identical in chemical composition and physical state (chem)
7. The particular state of a substance, as a solid, liquid, or gas (chem)
8. A morph (zoology)
9. One of the circuits in an electrical system in which there are two or more alternating currents out of phase with each other by equal amounts (elec)

To do by phases or stages

phased adjective

1. Adjusted to be in the same phase at the same time
2. By stages

phaseˈless adjective

Unchanging

phāˈsic (or /-sik/) adjective

phāˈsing noun

A technique used to achieve a distorted sound from electronic instruments by introducing a phase shift in one copy of the sound signal and recombining this with the original

phase-contrast microscope or phase-difference microscope noun

One in which phase differences due to the refractive index of cellular components are converted to differences of light intensity, of particular value in examining living unstained cells

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