tracheole

[ trey-kee-ohl ]
/ ˈtreɪ kiˌoʊl /

noun Entomology.

any of the smallest branches of an insect trachea.

Origin of tracheole

First recorded in 1900–05; trache(a) + -ole1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019