Spiders' sensors, e.g

• Kin of vibrissae
• Botanical bristles
• Coarse, stiff hairs
• Stiff hairs or bristles, such as on caterpillars
• Caterpillars' hairs
• Caterpillar's bristles
• Caterpillar hairs, e.g

Wiktionary Word definitions in Wiktionary
n. (plural of seta English)

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Seta \Se"ta\ (s[=e]"t[.a]), n.; pl. Set[ae] (s[=e]"t[=e]). [L. seta, saeta, a bristle.] (Biol.) Any slender, more or less rigid, bristlelike organ or part; as the hairs of a caterpillar, the slender spines of a crustacean, the hairlike processes of a protozoan, ...

WordNet Word definitions in WordNet
n. stalk of a moss capsule a stiff hair or bristle [also: setae (pl)]