单词 | coma |
释义 | coma1/ˈkəʊmə![]() noun 1A prolonged state of deep unconsciousness, caused especially by severe injury or illness: she went into a coma...
Synonyms unconsciousness, insensibility, stupor, oblivion, inertia; blackout, collapse, torpor, trance; Medicine persistent vegetative state, PVS rare sopor 1.1 humorous A state of extreme lethargy or sleepiness: after the film I settled into a coma...
OriginMid 17th century: modern Latin, from Greek kōma 'deep sleep'; related to koitē 'bed' and keisthai 'lie down'. Rhymescoma2/ˈkəʊmə![]() noun (plural comae /ˈkəʊmiː/) 1 Astronomy A diffuse cloud of gas and dust surrounding the nucleus of a comet.Rosetta's instruments will analyse the gases and dust grains in the coma that forms when the comet becomes active, as well as the interaction with the solar wind....
1.1 [mass noun] Optics Aberration which causes the image of an off-axis point to be flared like a comet.These Seidel sums correspond to spherical aberration, coma, astigmatism, Petzval curvature and distortion....
OriginEarly 17th century (in botanical sense 'tuft of hairs on seed'): via Latin from Greek komē 'hair of the head'. |
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