Arista

noun

1. A bristlelike part or appendage, such as the awn of grains and grasses or the process near the tip of the antenna of certain flies.
2. In botany, an awn (which see).
3. In zoology, an awn or tactile filament at the end of the antenna of an insect, as in some Diptera.
4. An awn.
5. the fibrils found on grains or fishes.