coma
1. a state of deep and often prolonged unconsciousness;
usually the result of disease or injury (Freq. 1)
• Syn:
comatoseness
• Derivationally related forms:
comatose (for: comatoseness)
• Hypernyms:
unconsciousness
• Hyponyms:
diabetic coma, Kussmaul's coma, hepatic coma
2. (botany) a usually terminal tuft of bracts (as in the pineapple) or tuft of hairs (especially on certain seeds)
• Derivationally related forms:
comal
• Topics:
botany, phytology
• Hypernyms:
tuft, tussock
3. (astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet;
forms as the comet approaches the sun and is warmed
• Topics:
astronomy, uranology
• Hypernyms:
cloud
• Part Holonyms:
comet
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