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A bristle or a slender, stiff, bristle-like structure.
[L. saeta or seta, a stiff hair or bristle]
n. pl. chae·tae (-tē′)
A bristle or seta, especially of an annelid worm.
setaa bristle-like structure, often chitinous (see CHITIN). The structures are found particularly in ANNELID worms, where they occur as projections on most segments, and serve as anchors for that segment during locomotion.