axillar

[ak-suh-ler]

noun Ornithology.

Origin of axillar

First recorded in 1535–45; axill(a) + -ar¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Any doubt arising as to which species a specimen may belong can easily be settled by an examination of the axillar plumes.
Game Birds and Game Fishes of the Pacific Coast
Harry Thom Payne
The scales are large, with a long dorsal bract, and fall from the axillar spindle of the cone in the spring of the second year.
Woodland Gleanings
Charles Tilt