Definition of cribellum in English:


nounPlural cribella

  • (in some spiders) an additional spinning organ with numerous fine pores, situated in front of the spinnerets.

    • ‘When a Uloborus emerges from an egg sac, its cribellum is not formed and it can not produce capture threads until it molts (sheds its exoskeleton) and enters the next developmental stage.’
    • ‘The cribellum kept the original function (making spinning threads), the colulus not.’
    • ‘The cribellum is a cigar-shaped plate on the underside of the abdomen, in front of the spinnerets.’
    • ‘Cribellate silk is combed out from the cribellum using the calamistrum, a group of specialized, curved setae on the metatarsus of the fourth leg.’
    • ‘Six spinnerets with different types of spigots and a specialised spinning organ called the cribellum.’


Late 19th century: from late Latin, diminutive of cribrum ‘sieve’.