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trichome

[trik-ohm, trahy-kohm]
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noun
  1. Botany. an outgrowth from the epidermis of plants, as a hair.
  2. a microorganism composed of many filamentous cells arranged in strands or chains.

Origin of trichome

First recorded in 1870–75, trichome is from the Greek word tríchōma growth of hair. See trich-, -oma
Related formstri·chom·ic [trih-kom-ik, -koh-mik] /trɪˈkɒm ɪk, -ˈkoʊ mɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for trichome

trichome

noun
  1. any hairlike outgrowth from the surface of a plant
  2. any of the threadlike structures that make up the filaments of blue-green algae
Derived Formstrichomic (trɪˈkɒmɪk), adjective

Word Origin

C19: from Greek trikhōma, from trikhoun to cover with hair, from thrix a hair
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

trichome in Science

trichome

[trĭkōm′, trīkōm′]
  1. One of the hairlike or bristlelike outgrowths on the epidermis of a plant. Trichomes serve a variety of functions, depending on their location. As root hairs (and as leaf hairs in epiphytes), trichomes absorb water and minerals. As leaf hairs, they reflect radiation, lower plant temperature, and reduce water loss. They also provide defense against insects.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.