1. [ noun ] (psychology) a state of deep and often prolonged unconsciousness; usually the result of disease or injury
Synonyms: comatoseness
Related terms: unconsciousness hepatic_coma diabetic_coma
2. [ noun ] (botany,zoology) a usually terminal tuft of hairs especially on a seed
Related terms: hair
3. [ noun ] (astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet; forms as the comet approaches the sun and is warmed
Related terms: cloud comet astronomy
Similar spelling:   comma