Definition of seta in English:


Pronunciation /ˈsēdə/ /ˈsidə/


  • 1Zoology
    A stiff structure resembling a hair or a bristle, especially in an invertebrate.

    ‘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.’
    • ‘Spiders, however, have a different adhesive structure at the tip of each leg, formed from a dense aggregation of miniature hairs called setae.’
    • ‘This will take place in a coordinated fashion across fields of setae, thus resulting in a staged detachment process and allowing for controlled weight transference during the locomotor cycle.’
    hair, whisker
    1. 1.1Botany (in a moss or liverwort) the stalk supporting the capsule.
      ‘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.’
      stem, shoot, trunk, stock, cane, bine, bent, haulm, straw, reed


Late 18th century from Latin, ‘bristle’.