pilus
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pilus
[′pī·ləs] (anatomy)
A hair.
(biology)
A fine, slender, hairlike body.
(microbiology)
Any filamentous appendage other than flagella on certain gram-negative bacteria. Also known as fimbria.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.