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Webster 1913 Edition


Coma


Co′ma

(kō′mȧ)
,
Noun.
[NL., fr. Gr.
κῶμα
lethargy, fr.
κοιμᾶν
to put to sleep. See
Cemetery
.]
A state of profound insensibility from which it is difficult or impossible to rouse a person. See
Carus
.

Co′ma

,
Noun.
[L., hair, fr. Gr.
κόμη
.]
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
[L.]
(Astron.)
,
a small constellation north of Virgo; – called also
Berenice’s Hair
.

Webster 1828 Edition


Coma

COMA

,
Noun.
Lethargy; dozing; a preternatural propensity to sleep; a kind of stupor of diseased persons.

COMA

, n.
1.
In botany, a species of bracte, terminating the stem of a plant, in a tuft or bush; as in crown-imperial.
2.
In astronomy, hairiness; the hairy appearance that surrounds a comet, when the earth or the spectator is between the comet and the sun.