coma — English Dictionary

Noun

1. A state of unconsciousness from which one may not wake up, usually induced by some form of trauma.

   Related words

   comatosepersistent vegetative statebrain death

   Examples

   go into a coma

   slip into a coma

   More examples (3)

   come out of a coma

   An a aphrodisiac, it results in santonin poisoning, followed by coma and death.

   I wonder if a person who comes out of a coma feels refreshed and well rested.

Noun

1. A cloud of dust surrounding the nucleus of a comet.

2. A defect characterized by diffuse, pear-shaped images that in an ideal image would appear as points.

3. A tuft or bunch, such as the assemblage of branches forming the head of a tree, a cluster of bracts when empty and terminating the inflorescence of a plant, or a tuft of long hairs on certain seeds.

Noun

1. a state of deep and often prolonged unconsciousness; usually the result of disease or injury

   Synonyms

   comatoseness

   Broader terms

   unconsciousness

2. (botany) a usually terminal tuft of bracts (as in the pineapple) or tuft of hairs (especially on certain seeds)

   Broader terms

   tufttussock

3. (astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet; forms as the comet approaches the sun and is warmed

   Broader terms

   cloud