Meaning of hypoptilum | Babel Free

Definitions

An aftershaft.

rare

Examples

“This secondary feather is known as the aftershaft or hypoptilum, and its presence or absence constitutes the most important structural difference in the feathers of existing birds.”

“The feathers in some ratites are unusual as they are less reduced than is the norm in birds—each feather has, in addition to the main feather, a large “after-shaft” or hypoptilum.”

CEFR level