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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 ?
Another mechanism that retards dispersal is a collar of trichomes in the interior of the calyx tube.
The cotyledonary petiole (Figure 3B) has uniseriate epidermis with unicellular non-glandular trichomes, collenchymatous and parenchymatous cortex and three collateral vascular bundles.
Functional interaction between leaf trichomes, leaf wettability and the optical properties of water droplets.
So, this weak rate of the herbivors attack on the culture supposrts the hypothesis that the foliar trichomes are the source of the limitation of the insects attack in the intercropping plots, thereby limiting the progress of cryptogamic deseases generally conveyed by these latters[43, 44, 60, 61,15].
Mite feeding induces the formation of erinosis, which according to Westphal (1977), are trichomes abnormally developed due to the injection of toxic substances by A.
2008) who reported that trichome density has negative correlation with the population of leafhopper (Amrasca biguttula biguttula) on the brinjal crop.
Both species have bitegmic and anatropous ovule, obturator, trichomes and a resinuous gland, which is composed of flange-like structures that are modified bractlets (Webster and Webster, 1972).
A dense area of glandular trichomes is located in a central depression of the inner tepals, and the style is slender below, with branches well developed, compressed, usually divided above into prominent acute crests and with a transverse stigmatic surface on the abaxial surface at the base of the crests (Ravenna, 2003; Goldblatt & Manning, 2008; Ravenna, 2009; Deble et al.
Stomatal index, stomatal density, and trichomes density were analyzed for adaxial and abaxial surfaces of each biotype.