The gapes

A fit of yawning.
A disease of young poultry and other birds, attended with much gaping. It is caused by a parasitic nematode worm (Syngamus trachealis), in the windpipe, which obstructs the breathing. See Gapeworm.

See also: Gape, Gape

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The gapes reflect a lot of ultraviolet, but the nests don't, Hunt and her colleagues report in an upcoming Proceedings of the Royal Society of London B.