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Definitions for Coma

[1] a state of prolonged unconsciousness, including a lack of response to stimuli, from which it is impossible to rouse a person.
[2] Astronomy . the nebulous envelope around the nucleus of a comet.
[3] Optics . a monochromatic aberration of a lens or other optical system in which the image from a point source cannot be brought into focus, the image of a point having the shape of a comet.
[4] Botany . a tuft of silky hairs at the end of a seed. the leafy crown of a tree; cluster of leaves at the end of a stem. a terminal cluster of bracts, as in the pineapple.
[5] a state of unconsciousness from which a person cannot be aroused, caused by injury to the head, rupture of cerebral blood vessels, narcotics, poisons, etc
[6] astronomy the luminous cloud surrounding the frozen solid nucleus in the head of a comet, formed by vaporization of part of the nucleus when the comet is close to the sun
[7] botany a tuft of hairs attached to the seed coat of some seeds the terminal crown of leaves of palms and moss stems
[8] optics a type of lens defect characterized by the formation of a diffuse pear-shaped image from a point object

Words related to Coma

slumber, oblivion, stupor, trance, torpor, torpidity, lethargy, syncope, insensibility, swoon, hebetude, sleep, faint, dullness, blackout, somnolence

Words nearby Coma

com, com-, com., com. in chf., com. ver., coma, coma aberration, coma berenices, coma scale, comaker, comal

Origin of Coma

21660–70; < Latin: hair < Greek kómē

Word origin for Coma

C17: from Latin: hair of the head, from Greek komē

Synonyms for Coma

oblivion, slumber, stupor, trance, blackout, dullness, faint, hebetude, insensibility, lethargy, sleep, somnolence, swoon, syncope, torpidity, torpor