Coma

The dust and gas surrounding the nucleus of a comet. A defect in an optical system which gives rise to a blurred, pear shaped, comet-like image.

Coma

A sleep-like state in which a person is not conscious. May be caused by hyperglycaemia (high blood glucose) or hypoglyceamia (low blood glucose) in people with diabetes.

coma

(Humans as organisms) a state of deep unconciousness in which a person does not respond to any external stimuli

Coma

The cloud of diffuse material surrounding the nucleus of a comet.

coma

Type: Term Pronunciation: kō′mă Definitions: 1. A state of profound unconsciousness from which one cannot be roused; may be due to the action of an ingested toxic substance or of one formed in the body, to trauma, or to disease. 2. An aberration of spheric lenses; occurring in cases of oblique incidence (the image of a point becomes...
Found on http://www.medilexicon.com/medicaldictionary.php?t=19192

coma

A state of profound unconsciousness from which one cannot be roused.
Found on http://www.aans.org/Media/Glossary-of-Terminology

coma

The dust and gas surrounding an active comet's nucleus.
Found on http://www.solarviews.com/eng/terms.htm

coma

Latin, meaning: hair of the head, leaves, rays of light.
Found on http://archives.nd.edu/ccc.htm

coma

A spherical cloud of material surrounding the head of a comet. This material is mostly gas that the Sun has caused to boil off the comet's icy nucleus. This gas shines both by reflected sunlight and light emitted by excited molecules. A cometary coma can extend up to a million miles from the nucleus.
Found on https://www.encyclo.co.uk/local/20037

Coma

A lens defect which results in points of light appearing in the image not as points but as discs with comet-like tails.
Found on http://www.peterashbyhayter.co.uk/glossaryT-Z.html

coma

[n] - a usually terminal tuft of hairs especially on a seed 2. [n] - (astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet 3. [n] - a state of deep and often prolonged unconsciousness
Found on http://www.webdictionary.co.uk/definition.php?query=coma

Coma

A period of profound and prolonged unconsciousness following disease or injury.
Found on http://www.encyclo.co.uk/local/20437

coma

a sleep-like state in which a person is not conscious. May be caused by hyperglycemia (high blood glucose) or hypoglycemia (low blood glucose) in people with diabetes.
Found on http://www.diabetes.co.uk/glossary/c.html

Coma

A spherical cloud of material surrounding the head of a comet. This material is mostly gas that the Sun has caused to boil off the comet's icy nucleus. This gas shines both by reflected sunlight and light emitted by excited molecules. A cometary coma can extend up to a million miles from the nucleus.
Found on http://www.diracdelta.co.uk/science/source/c/o/coma/source.html

coma

The gas and dust surrounding the nucleus of a comet.. We see a comet's coma for two reasons. First, because the dust in the coma reflects sunlight and, second, because sunlight makes the gas in the coma fluorescent.
Found on http://www.gcse.com/glos.htm

Coma

a condition in which the area of the brain involved in maintaining consciousness is somehow affected, resulting in a state of unconsciousness in which the patient does not respond to stimulation
Found on http://www.medichecks.com/glossary.cfm?ltr=C

Coma

A coma is a sleep like state when someone is unconscious for a long period of time.
Found on http://www.nhs.uk/Conditions/Pages/hub.xhtml

Coma

A state of unconsciousness from which the person cannot be roused by external stimuli.
Found on http://www.gadsbywicks.co.uk/uploaded/3822.pdf

Coma

Our Coma Main Article provides a comprehensive look at the who, what, when and how of Coma Coma: A state of deep unarousable unconsciousness. Coma may occur as the result of numerous causes including head trauma, diseases such as diabetes, poisoning, etc.
Found on http://www.medterms.com/script/main/art.asp?articlekey=2803

Coma

A lens aberration or defect that causes rays that passes obliquely through the lens to be focused at different points on the film plane.
Found on http://www.rodsmith.org.uk/photographic%20glossary/rods%20photographic%20gl

Coma

A lens aberration restricted to off axis image points; the inability of a lens to render point sources of light near the edges of the frame as circular; the points of light appear as comet-shaped blurs (hence the name coma) with the tails flaring toward the center of the image; this aberration is very difficult to eliminate in wideangle lenses with...
Found on http://www.rodsmith.org.uk/photographic%20glossary/rods%20photographic%20gl

Coma

Co'ma (kō'mȧ) noun [ New Latin , from Greek kw^ma lethargy, from koima^n to put to sleep. See Cemetery .] A state of profound insensibility from which it is difficult or impossible to rouse a person. See Carus .
Found on http://www.encyclo.co.uk/webster/C/113

Coma

Co'ma noun [ Latin , hair, from Greek ko`mh .] 1. (Astron.) The envelope of a comet; a nebulous covering, which surrounds the nucleus or body of a comet. 2. (Botany) A tuft or bunch, -- as the assemblage of branches forming the head of a tree; or a cluster...
Found on http://www.encyclo.co.uk/webster/C/113

coma

A deep prolonged unconsciousness where the patient cannot be aroused. This is usually as the result of a head injury, neurological disease, acute hydrocephaly, intoxication or metabolic derangement. ... (27 Sep 1997) ...
Found on http://www.encyclo.co.uk/local/20973

coma

comatoseness noun a state of deep and often prolonged unconsciousness; usually the result of disease or injury
Found on https://www.encyclo.co.uk/local/20974
No exact match found