- a sievelike spinning organ in certain spiders that occurs between the spinnerets
C19: New Latin, from Late Latin cribellum, diminutive of Latin cribrum a sieve
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Examples from the Web for cribellum
In the male the cribellum is rudimentary, and there is no calamistrum.The Common Spiders of the United States
James Henry Emerton
Cribellum, kri-bel′um, n. an accessory spinning-organ of certain spiders—also Cribrell′um:—pl.
By means of the calamistrum these spiders comb from the cribellum a band of loose threads which form a part of their webs.
They have in front of the usual spinnerets an additional organ, which is named the cribellum (Fig. 102, c).
There are two quite distinct types of regular webs made by spiders possessing a cribellum and a calamistrum.