| coma | | |
| n. | 1. coma, comatoseness | a state of deep and often prolonged unconsciousness; usually the result of disease or injury. |
| ~ unconsciousness | a state lacking normal awareness of the self or environment. |
| ~ diabetic coma, kussmaul's coma | coma that can develop in inadequately treated cases of diabetes mellitus. |
| ~ hepatic coma | coma that can occur in severe cases of liver disease. |
| n. | 2. coma | (botany) a usually terminal tuft of bracts (as in the pineapple) or tuft of hairs (especially on certain seeds). |
| ~ phytology, botany | the branch of biology that studies plants. |
| ~ tuft, tussock | a bunch of hair or feathers or growing grass. |
| n. | 3. coma | (astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet; forms as the comet approaches the sun and is warmed. |
| ~ astronomy, uranology | the branch of physics that studies celestial bodies and the universe as a whole. |
| ~ comet | (astronomy) a relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit. |
| ~ cloud | any collection of particles (e.g., smoke or dust) or gases that is visible. |
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