Bot. [ad. Gr. τρίχωμα (see TRICHOMA); cf. CAULOME.] The general name for any outgrowth of the epidermis or superficial tissue of a plant, as hairs, scales, prickles, etc.
1875. Bennett & Dyer, trans. Sachs’ Bot., 129. We may term all appendages of other parts which originate as outgrowths of epidermis-cells, whatever their form and function, Hairs (Trichomes). Thus the so-called paleæ and sporangia of Ferns are trichomes.
1876. Encycl. Brit., IV. 90/1. Hairs, scales, prickles, &c.,… all have been embraced under the general name trichome.
