• synonyms


[pahy-luh s]
noun, plural pi·li [pahy-lahy] /ˈpaɪ laɪ/. Biology.
  1. a hair or hairlike structure.
Show More

Origin of pilus

Borrowed into English from Latin around 1955–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for pilus

Historical Examples

pilus in Medicine


n. pl. pi•li (-lī′)
  1. A hair.
  2. A fine filamentous appendage, somewhat analogous to the flagellum, that occurs on some bacteria.fimbria
Show More
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.