Noun
- 1. coma, comatoseness, unconsciousness
- usage: a state of deep and often prolonged unconsciousness; usually the result of disease or injury
- 2. coma, tuft, tussock
- usage: (botany) a usually terminal tuft of bracts (as in the pineapple) or tuft of hairs (especially on certain seeds)
- 3. coma, cloud
- usage: (astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet; forms as the comet approaches the sun and is warmed
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