COMA

Definition of COMA

  1. (noun)a state of deep and often prolonged unconsciousness; usually the result of disease or injury
  2. (noun)(botany) a usually terminal tuft of bracts (as in the pineapple) or tuft of hairs (especially on certain seeds)
  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