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Meaning of holopneustic

hol•op•neus•tic

Pronunciation: (hol"up-n'stik, -ny'-, hō"lup-), [key]
— adj.
  1. having all the spiracles open, as the tracheal systems of most insects.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.