Source : Webster's Revised Unabridged Dictionary (1913)

Araneidan \Ar`a*ne"i*dan\, a. (Zo["o]l.)
   Of or pertaining to the Araneina or spiders. -- n. One of the
   Araneina; a spider.

Source : WordNet®

araneidan
     adj : relating to or resembling a spider [syn: {araneidal}]