[ ap-teer-ee-uh m ]
/ æpˈtɪər i əm /

noun, plural ap·te·ri·a [ap-teer-ee-uh] /æpˈtɪər i ə/. Ornithology.

one of the featherless portions of the skin of a bird.
Compare pteryla.

Origin of apterium

From New Latin, dating back to 1865–70; see origin at a-6, pter-, -ium

Related forms

ap·te·ri·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019