trich·ome 
(trĭkōm′, trīkōm′)
(trĭkōm′, trīkōm′)n.
A hairlike or bristlelike, sometimes glandular, outgrowth from the epidermis of a plant.
[Greek trikhōma, growth of hair, from trikhoun, to cover with hair, from thrix, trikh-, hair, of unknown origin.]