Definition of seta in English:

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Pronunciation: /ˈsēdə/

noun (plural setae /-tē/)

chiefly Zoology
1A stiff hairlike or bristlelike structure, especially in an invertebrate.
Example sentences
  • Each feeding leg, split into two branches, carries stiff bristles and feathery setae.
  • Ice worms propel themselves using setae, extremely small bristles that protrude from the sides of their bodies.
  • Inside their gill chambers are mats and hair-like setae covered in bacteria.
1.1 Botany (In a moss or liverwort) the stalk supporting the capsule.
Example sentences
  • Only the youngest sporophytes with unelongated setae were used.
  • Similarly, setae may be simple stalks with single spatulate tips, or they may be sparsely or profusely branched.



Pronunciation: /səˈtāSHəs/


Example sentences
  • If this is the case, setal morphology would have a greater effect on force of adhesion than surface chemistry of the seta or substrate.
  • The krill then squirt the seawater sideways through their setal filters, entrapping algae in a feeding pattern much like the baleen whales.
  • The width of the setal tips also varies between taxa.


Late 18th century: from Latin, 'bristle'.

For editors and proofreaders

Syllabification: se·ta

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