Printer Friendly
Dictionary, Encyclopedia and Thesaurus - The Free Dictionary
1,777,398,216 visitors served.
forum mailing list For webmasters
?
New: Language forums
Dictionary/
thesaurus
Medical
dictionary
Legal
dictionary
Financial
dictionary
Acronyms
 
Idioms
Encyclopedia
Wikipedia
encyclopedia
?

coma
(redirected from alpha coma)

   Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson 0.01 sec.
co·ma 1  (km)
n. pl. co·mas
A state of deep, often prolonged unconsciousness, usually the result of injury, disease, or poison, in which an individual is incapable of sensing or responding to external stimuli and internal needs.

[Greek kma, deep sleep.]

co·ma 2  (km)
n. pl. co·mae (-m)
1. Astronomy The nebulous luminescent cloud containing the nucleus and constituting the major portion of the head of a comet.
2. Botany A usually terminal tuft or cluster, especially a tuft of hairs on a seed, as on a willow or milkseed.
3. Physics A diffuse, comet-shaped image of a point source of light or radiation caused by aberration in the optical system.

[Latin, hair, from Greek kom.]

comal adj.

coma1
n pl -mas
(Medicine / Pathology) 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.
[from medical Latin, from Greek kōma heavy sleep; related to Greek koitē bed, perhaps to Middle Irish cuma grief]

coma2
n pl -mae [-miː]
1. (Astronomy) Astronomy 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
2. (Life Sciences & Allied Applications / Botany) Botany
a.  a tuft of hairs attached to the seed coat of some seeds
b.  the terminal crown of leaves of palms and moss stems
3. (Physics / General Physics) Optics a type of lens defect characterized by the formation of a diffuse pear-shaped image from a point object
[from Latin: hair of the head, from Greek komē]
comal  adj

coma 1  (km)
Plural comas
A state of deep unconsciousness, usually resulting from brain trauma or metabolic disease, in which an individual is incapable of sensing or responding to external stimuli.

coma 2  (km)
Plural comae (km)
1. Astronomy The brightly shining cloud of gas that encircles the nucleus and makes up the major portion of the head of a comet near the Sun. As a comet moves along its orbit away from the Sun, the gas and dust of the coma dissipate, leaving only the nucleus. A coma can have a diameter of up to 100,000 km (62,000 mi.). See more at comet.
2. Physics A diffuse, comet-shaped image of a point source of light or radiation caused by aberration in a lens or mirror. The image appears progressively elongated with distance from the center of the field of view.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.coma - a state of deep and often prolonged unconsciousness; usually the result of disease or injury
unconsciousness - a state lacking normal awareness of the self or environment
diabetic coma, Kussmaul's coma - coma that can develop in inadequately treated cases of diabetes mellitus
hepatic coma - coma that can occur in severe cases of liver disease
2.coma - (botany) a usually terminal tuft of bracts (as in the pineapple) or tuft of hairs (especially on certain seeds)
phytology, botany - the branch of biology that studies plants
tuft, tussock - a bunch of hair or feathers or growing grass
3.coma - (astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet; forms as the comet approaches the sun and is warmed
astronomy, uranology - the branch of physics that studies celestial bodies and the universe as a whole
comet - (astronomy) a relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit
cloud - any collection of particles (e.g., smoke or dust) or gases that is visible

coma
noun unconsciousness, trance, oblivion, lethargy, stupor, torpor, somnolence, insensibility She had slipped into a coma by the time she reached the hospital.
Translations
coma [ˈkəʊmə] Ncoma m
to be in a comaestar en(estado de)coma

coma [ˈkəʊmə] ncoma m
to be in a coma → être dans le coma

coma
nKoma nt; to be in a comaim Koma liegen; to go or fall into a comains Koma fallen

coma [ˈkəʊmə] n (Med) → coma m inv
to go into a coma → entrare in coma
coma [ˈkəʊmə] n (Med) → coma m inv
to go into a coma → entrare in coma

coma
n coma [ˈkoumə]
a long-continuing unconscious state He was in a coma for several days after the accident. koma غَيْبوبَه، فُقْدان الذّاكِرَه кома kóma coma das Koma κώμα coma kooma اغما kooma coma תַרדֶמֶת निश्चेतना koma kóma koma coma こん睡状態 혼수상태 koma koma koma coma koma, dyp bevisstløshet letarg, śpiączka coma comă кома kóma koma koma koma สภาพไม่รู้สึกตัวของผู้ป่วย koma 昏迷 кома طویل بے ہوشی sự hôn mê

coma غيبوبة عميقة kóma koma Koma κώμα coma kooma coma koma coma 昏睡 혼수 coma koma śpiączka coma кома koma สภาพไม่รู้สึกตัวของผู้ป่วย koma sự hôn mê 昏迷


How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content.
?Page tools
Printer friendly
Cite / link
Email
Feedback
Add definition
? Mentioned in
 
Dictionary/thesaurus browser? ? Full browser
 
 
Dictionary, Thesaurus, and Translations
?

Disclaimer | Privacy policy | Feedback | Copyright © 2009 Farlex, Inc.
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. Terms of Use.