A*ra`ne*i"na (#), n. pl. [NL., fr. L. aranea spider.] Zool.
The order of Arachnida that includes the spiders.
⇒ They have mandibles, modified as poison fangs, leglike palpi, simple eyes, abdomen without segments, and spinnerets for spinning a web. They breathe by pulmonary sacs and tracheæ in the abdomen. See Illustration in Appendix.
© Webster 1913.