n. (pl. comas) a prolonged deep unconsciousness, caused esp. by severe injury or excessive use of drugs.
Etymology: med.L f. Gk koma deep sleep
2.
n. (pl. comae)
1 Astron. a cloud of gas and dust surrounding the nucleus of a comet.
2 Bot. a tuft of silky hairs at the end of some seeds.
Etymology: L f. Gk kome hair of head
Useful english dictionary. 2012.