coma

Inflections of 'coma' (n):

co•ma¹ n. [countable], pl. -mas.

Pathologya state of deep unconsciousness, often caused by a serious head injury:in a coma that lasted for months.

co•ma¹ n., pl. -mas.

a state of prolonged unconsciousness, including a lack of response to stimuli, from which it is impossible to rouse a person.

co•ma² n., pl. -mae

Astronomythe nebulous envelope around the nucleus of a comet.
Opticsa 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.
[Bot.]
- Botanya tuft of silky hairs at the end of a seed.
- Botanythe leafy crown of a tree;
  cluster of leaves at the end of a stem.
- Botanya terminal cluster of bracts, as in the pineapple.

Collins Concise English Dictionary © HarperCollins Publishers::

coma /ˈkəʊmə/ n ( pl -mas)

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

Etymology: 17th Century: from medical Latin, from Greek kōma heavy sleep; related to Greek koitē bed, perhaps to Middle Irish cuma grief

coma /ˈkəʊmə/ n ( pl -mae /-miː/)

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
- a tuft of hairs attached to the seed coat of some seeds
- the terminal crown of leaves of palms and moss stems

Etymology: 17th Century: from Latin: hair of the head, from Greek komē

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