Dictionary.net

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

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

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

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

A state of profound insensibility from which it is difficult or impossible to rouse a person. See Carus.

The envelope of a comet; a nebulous covering, which surrounds the nucleus or body of a comet.

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

A profound state of unconsciousness associated with depressed cerebral activity from which the individual cannot be aroused. Coma generally occurs when there is dysfunction or injury involving both cerebral hemispheres or the brain stem RETICULAR FORMATION.

Prolonged unconsciousness; insensibility; stupor; the cloudy, hairlike envelope surrounding the nucleus, or center, of a comet.

Deep stupor or sleep; unconsciousness; lethargy.

Deep sleep: stupor.

Hairy appearance of a comet; lethargy.

The glowing, hazy mass around the nucleus of a comet.

A tuft of silky hairs.

A profound state of sleep, from which it is extremely difficult to rouse the individual. It is a symptom which occurs in many diseases. Two varieties are distinguished, 1. Coma vigil seu ogrypnodes, Pervigilium, Virgiliae nimiae, Typhonia, Veternus, Veternositas, Agrypnocoma, Carus lethargus vigil, Typhomania, which is accompanied with delirium. The patient has his eyes closed, but opens them when called; and closes them again immediately. This state is accompanied with considerable restlessness. 2. Coma Somnolentum, C. Comatodes;- in which the patient speaks when roused, but remains silent and immovable in the intervals. Coma is a deeper sleep than sopor, but less so than lethargy and carus. Coma, Capilus- c Agrypnodes, see Coma- c. Apoplexia, Apoplexy- c. Somnolentum, Somnolency, see Coma- c. Vigil, see Coma.

Profound stupor in sickness or after severe injury.

A condition of insensibility, following disease or trauma, from which the patient can be roused but partially or not at all.