Noun coma has 3 senses
  1. coma, comatoseness - a state of deep and often prolonged unconsciousness; usually the result of disease or injury
    --1 is a kind of unconsciousness
    --1 has particulars: diabetic coma, Kussmaul's coma; hepatic coma
  2. coma - a usually terminal tuft of hairs especially on a seed
    --2 is a kind of
    hair, fuzz, tomentum
  3. coma - (astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet; forms as the comet approaches the sun and is warmed
    --3 is a kind of
    --3 is a part of comet