pilus

pilus

[pahy-luhs]
noun, plural pili [pahy-lahy] . Biology.
a hair or hairlike structure.

Origin:
1955–60; < Latin

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Medical Dictionary

pilus pi·lus (pī'ləs)
n. pl. pi·li (-lī')

  1. A hair.

  2. A fine filamentous appendage, somewhat analogous to the flagellum, that occurs on some bacteria. Also called fimbria.

The American Heritage® Stedman's Medical Dictionary
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