co·ma /ˈkomə/ 名詞
Co·ma n. A state of profound insensibility from which it is difficult or impossible to rouse a person. See Carus.
1. Astron. The envelope of a comet; a nebulous covering, which surrounds the nucleus or body of a comet.
2. Bot. A tuft or bunch, -- as the assemblage of branches forming the head of a tree; or a cluster of bracts when empty and terminating the inflorescence of a plant; or a tuft of long hairs on certain seeds.
Coma Berenices Astron., a small constellation north of Virgo; -- called also Berenice's Hair.
n 1: a state of deep and often prolonged unconsciousness; usually
the result of disease or injury [syn: comatoseness]
2: a usually terminal tuft of hairs especially on a seed
3: (astronomy) the luminous cloud of particles surrounding the
frozen nucleus of a comet; forms as the comet approaches
the sun and is warmed
[also: comae (pl)]