Meaning of coma

Definition of coma

(noun) a state of deep and often prolonged unconsciousness; usually the result of disease or injury
(botany) a usually terminal tuft of bracts (as in the pineapple) or tuft of hairs (especially on certain seeds)
(astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet; forms as the comet approaches the sun and is warmed

Other information on coma

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