Relating to or involving hair or hair-like structures found on the outer surface of something, especially in botanical or zoological contexts.
Composed of 'epi-' (upon, outer) and 'trichial,' derived from Greek 'thrix' (hair). The adjective form describes anything involving surface-level hair or hair-like projections.
Many plants have tiny hair-like structures on their leaves called trichomes, which protect them from insects and UV radiation—they're like microscopic fur coats for plants!
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