papilla(redirected from urethral papilla)
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1. the small projection of tissue at the base of a hair, tooth, or feather
2. any other similar protuberance
3. any minute blunt hair or process occurring in plants
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
A small, nipplelike eminence.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.