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1. (n.) coma
a state of prolonged unconsciousness, including a lack of response to stimuli, from which it is impossible to rouse a person.
2. (n.) coma
the nebulous envelope around the nucleus of a comet.
3. coma
a monochromatic aberration of a lens or other optical system in which the image from a point source cannot be focused.
4. coma
a tuft of hairs on a seed or a terminal cluster of leaves or bracts, as on a stem.
Etymology: (1660–70; < L: hair < Gk kómē)
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| Definition of 'COMA' |
Princeton's WordNet |
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1. (noun) coma, comatoseness
a state of deep and often prolonged unconsciousness; usually the result of disease or injury
2. (noun) coma
(botany) a usually terminal tuft of bracts (as in the pineapple) or tuft of hairs (especially on certain seeds)
3. (noun) coma
(astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet; forms as the comet approaches the sun and is warmed
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1. (noun) coma
a long period of being unconscious because of serious illness or injury
She had been in a coma for three months.
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| Definition of 'COMA' |
Webster Dictionary |
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1. (noun) COMA
a state of profound insensibility from which it is difficult or impossible to rouse a person. See Carus
2. (noun) COMA
the envelope of a comet; a nebulous covering, which surrounds the nucleus or body of a comet
3. (noun) COMA
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
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| Definition of 'COMA' |
U.S. National Library of Medicine |
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1. COMA
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.
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Sense: a long-continuing unconscious state
He was in a coma for several days after the accident.
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 Afrikaans: koma |
 Arabic: غَيْبوبَه، فُقْدان الذّاك |
 Bulgarian: кома |
 Brazilian: coma |
 Czech: kóma |
 German: das Koma |
 Danish: coma |
 Greek: κώμα |
 Spanish: coma |
 Estonian: kooma |
 Farsi: اغما |
 Finnish: kooma |
 French: coma |
 Hebrew: תַרדֶמֶת |
 Hindi: निश्चेतना |
 Croatian: koma |
 Hungarian: kóma |
 Indonesian: koma |
 Icelandic: dá |
 Italian: coma |
 Japanese: こん睡状態 |
 Korean: 혼수상태 |
 Lithuanian: koma |
 Latvian: koma |
 Malay: koma |
 Dutch: coma |
 Norwegian: koma, dyp bevisstløshet |
 Polish: letarg,śpiączka |
 Persian: اغما |
 Pashto: كوما ، بې حالى |
 Portuguese: coma |
 Romanian: comă |
 Russian: кома |
 Slovak: kóma |
 Slovenian: koma |
 Serbian: koma |
 Swedish: koma |
 Thai: สภาพไม่รู้สึกตัวของผู้ป่ว |
 Turkish: koma |
 Taiwanese: 昏迷 |
 Ukrainian: кома |
 Urdu: طویل بے ہوشی |
 Vietnamese: sự hôn mê |
 Chinese: 昏迷 |
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Definitions of COMA 
