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The Collaborative International Dictionary

Trichome \Trich"ome\, n. [See Trichomatose.] (Bot.) A hair on the surface of leaf or stem, or any modification of a hair, as a minute scale, or star, or gland. The sporangia of ferns are believed to be of the nature of trichomes. -- Tri*chom"a*tous, a.


n. 1 (context botany English) A hair- or scale-like extension of the epidermis of a plant. 2 (context biology English) hairlike structures found in some microscopic organisms and algae. 3 (context pathology cell biology English) A row of cells formed by successive cell divisions.


Trichomes ( or ), from the Greek τρίχωμα (trikhōma) meaning " hair", are fine outgrowths or appendages on plants, algae, lichens, and certain protists. They are of diverse structure and function. Examples are hairs, glandular hairs, scales, and papillae. A covering of any kind of hair on a plant is an indumentum, and the surface bearing them is said to be pubescent.

Usage examples of "trichome".

Soroka (1979) concludes that a positive correlation exists between the number of glandular trichomes on leaves and calyxes and the various cannabinoid contents of the floral clusters.

In actuality, there are very few resins within the vascular system of the plant and most of the resins have been secreted in the heads of glandular trichomes.