Meaning : A state of deep and often prolonged unconsciousness. Usually the result of disease or injury.
Synonyms : comatoseness
Meaning : (botany) a usually terminal tuft of bracts (as in the pineapple) or tuft of hairs (especially on certain seeds).
Meaning : (astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet. Forms as the comet approaches the sun and is warmed.