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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.



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).

References in periodicals archive ?
Rugosal and related carotane sesquiterpenes in the glandular trichome exudate of Rosa rugosa.
The number of adaxial (63) and abaxial (78.75) trichomes, together with the acylsugar content (35.29 nmols [cm.sup.-2] leaf area) was higher in S.
The stem indumentum presents glandular and non-glandular trichomes (Fig.
Epidermal cell type, type of stomata, type of trichome, and the nature of the mesophyll have been used before to differentiate P.
It is known that this species has trichomes that secrete toxic bimolecular that act on herbivorous insects [53, 64, 36, 14, 62, 37, 23].
The presence of trichomes can significantly stimulates the retention, and subsequently, the product absorption (Schonherr, 2006).
The diversity in the foliar trichomes is of taxonomic importance for discrimination of taxa at specific level.
Berlinger (1986) underlines that physical traits of leaf surfaces, such as pilosity, presence of adherent glandular trichomes and leaf format are aspects affecting oviposition preference by the whitefly.
tabacina disease: the first is the SGT-produced T-phylloplanins and the second is the abundant diterpenes and T-phylloplanins produced by tall trichomes on older leaves [19].