n. pl. pal•pe•bras
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for palpebra
This fold is lightly stretched over the edges of the eyelids, and forms, as it were, a third palpebra of a crescentic shape.Journal of the Third Voyage for the Discovery of a North-West Passage|William Edward Parry