\Spin"ner*et\, n. (Zo["o]l.)
One of the special jointed organs situated on the under side,
and near the end, of the abdomen of spiders, by means of
which they spin their webs. Most spiders have three pairs of
spinnerets, but some have only two pairs. The ordinary silk
line of the spider is composed of numerous smaller lines
jointed after issuing from the spinnerets.