| phase | (astronomy) the particular appearance of a body's state of illumination (especially one of the recurring shapes of the part of Earth's moon that is illuminated by the sun) |
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| phase | (physical chemistry) a distinct state of matter in a system |
| phase | a particular point in the time of a cycle |
| phase | any distinct time period in a sequence of events |
| phase | adjust so as to be in a synchronized condition |
| phase | arrange in phases or stages |
| phase | a particular point in the time of a cycle |
| phase | a change from one state (solid or liquid or gas) to another without a change in chemical composition |
| phase | a clinical trial on a few persons to determine the safety of a new drug or invasive medical device |
| phase | a clinical trial on a few persons to determine the safety of a new drug or invasive medical device |
| phase | a clinical trial on more persons than in phase I |
| phase | a clinical trial on more persons than in phase I |