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n. pl. pi·li (-lī′)
A hair or hairlike structure, especially a proteinaceous structure projecting from the surface of a bacterium that is smaller than a flagellum and functions in DNA transfer during conjugation and, usually with other such structures, in adhesion.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˈpaɪ ləs)

n., pl. -li (-lī).
a hair or hairlike structure.
[1955–60; < Latin]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pilus - any of the cylindrical filaments characteristically growing from the epidermis of a mammal; "there is a hair in my soup"
mammal, mammalian - any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk
filum, filament - a threadlike structure (as a chainlike series of cells)
ingrown hair - a hair that does not emerge from the follicle but remains embedded in the skin (usually causing inflammation)
2.pilus - hairlike structure especially on the surface of a cell or microorganism
microorganism, micro-organism - any organism of microscopic size
hair - a filamentous projection or process on an organism
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.