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co·ma 1

n. pl. co·mas
A state of deep, often prolonged unconsciousness, usually the result of injury, disease, or poison, in which an individual is incapable of sensing or responding to external stimuli and internal needs.

[Greek kōma, deep sleep.]

co·ma 2

n. pl. co·mae (-mē)
1. Astronomy The nebulous luminescent cloud surrounding the nucleus of a comet and composed of material evaporated from the nucleus when the comet is near the perihelion of its orbit. The nucleus and coma together form the head of a comet.
2. Botany A usually terminal tuft or cluster, especially a tuft of hairs on a seed, as on a willow or milkweed seed.
3. Physics A diffuse, comet-shaped image of a point source of light or radiation caused by aberration in an optical system.

[Latin, hair, from Greek komē.]

co′mal adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.comal - of certain seeds (such as cotton) having a tuft or tufts of hair; "comate (or comose) seeds"; "a comal tuft"
phytology, botany - the branch of biology that studies plants
haired, hairy, hirsute - having or covered with hair; "Jacob was a hairy man"; "a hairy caterpillar"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.