‖n. pl. [ NL., fr. L. aranea spider. ] (Zool.) The order of Arachnida that includes the spiders. [ 1913 Webster ]

☞ 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. [ 1913 Webster ]