Trichome

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trichome

[′trī‚kōm]
(botany)
An appendage derived from the protoderm in plants, including hairs and scales.
(invertebrate zoology)
A brightly colored tuft of hairs on the body of a myrmecophile that releases an aromatic substance attractive to ants.

Trichome

 

in plants, an outgrowth of epidermal cells that varies in shape, structure, and function. (Deeper-lying tissues participate in the formation of emergences.) The most common trichomes are hairs and glumes. The long, soft hairs that cover cotton seeds are a valuable raw material for the textile industry. The structures of trichomes and their location on plant organs have taxonomic significance (for example, in the family Cruciferae).