WordReference Random House Unabridged Dictionary of American English © 2025
ap•neus•tic
(ap no̅o̅′stik, -nyo̅o̅′-),USA pronunciation adj. [Entomol.]
- Insectshaving no open spiracles, as the tracheal systems of certain aquatic insect larvae.
- a-6 + Greek pneustikós pertaining to breathing, equivalent. to *pneust(os) (verbid of pneîn to breathe) + -ikos -ic