1. A state of deep and often prolonged unconsciousness;
    Usually the result of disease or injury (synset 105688034)
  2. (botany) a usually terminal tuft of bracts (as in the pineapple) or tuft of hairs (especially on certain seeds) (synset 113111155)
  3. (astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet;
    Forms as the comet approaches the sun and is warmed (synset 109273908)

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