What is the meaning of the word "coma"?

Definitions:

  1. a state of deep and often prolonged unconsciousness copy to clipboard noun
    • After the accident, I was in a coma for three weeks. copy to clipboard
  2. a usually terminal tuft of bracts, such as in the pineapple, or tuft of hairs, especially on certain seeds copy to clipboard noun
    • The cotton plant has a coma on its seed. copy to clipboard
  3. the luminous cloud of particles surrounding the frozen nucleus of a comet copy to clipboard noun
    • The comet was so close, you could see the coma during the day. copy to clipboard

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