
a flat spinning plate covered with thousands of tiny spigots. Together, these spigots produce a multi-stranded, 'wool-like' cribellate silk
Found on
http://australianmuseum.net.au/Glossary-Spider-Terms

The cribellum is a silk spinning organ found in certain spiders. Unlike normal spinnerets, the cribellum consists of one or more plates covered in thousands of tiny spigots. These spigots produce extremely fine fibers which are combed out by the spider`s calamistrum, producing silk with a wooly texture. The fibers are so small in diameter that pr....
Found on
http://en.wikipedia.org/wiki/Cribellum

• (n.) A peculiar perforated organ of certain spiders (Ciniflonidae), used for spinning a special kind of silk.
Found on
http://thinkexist.com/dictionary/meaning/cribellum/

(from the article `spider`) ...full complement of four pairs of spinnerets in the adult. Most spiders have three pairs, the forward central pair having been either lost or ...
Found on
http://www.britannica.com/eb/a-z/c/158
Cri·bel'lum noun [ Latin , a small sieve, dim. of
cribrum sieve.]
(Zoology) A peculiar perforated organ of certain spiders (
Ciniflonidæ ), used for spinning a special kind of silk.
Found on
http://www.encyclo.co.uk/webster/C/187

A spinning organ just in front of the spinners which appears as a transverse plate. Only present in cribellate spiders, which also have a calamistrum.
Found on
http://www.xs4all.nl/~ednieuw/Spiders/Spiderglossary.htm
No exact match found.