The Collaborative International Dictionary of English v.0.48:

Araneida \Ar`a*ne"i*da\, Araneoidea \Ar`a*ne*oid"e*a\, n. pl.
   [NL.] (Zool.)
   See Araneina.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Araneida
    n 1: spiders [syn: Araneae, order Araneae, Araneida,
         order Araneida]