Meaning of coma

co•ma

Pronunciation: (kō'mu), [key]
— pl. -mas.
  1. a state of prolonged unconsciousness, including a lack of response to stimuli, from which it is impossible to rouse a person.

co•ma

Pronunciation: (kō'mu), [key]
— pl. -mae
  1. the nebulous envelope around the nucleus of a comet.
  2. 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.
    1. a tuft of silky hairs at the end of a seed.
    2. the leafy crown of a tree; cluster of leaves at the end of a stem.
    3. a terminal cluster of bracts, as in the pineapple.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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