noun, plural pap·u·lae [pap-yuh-lee] /ˈpæp yəˌli/.
one of the small, ciliated projections of the body wall of an echinoderm, serving for respiration and excretion.
Origin of papula
1700–10; < New Latin, Latin: pimple, pustule. See papule
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019