ambulacral

from WordNet (r) 3.0 (2006)

ambulacral
    adj 1: pertaining to the ambulacra of radial echinoderms

from The Collaborative International Dictionary of English v.0.48

Ambulacral \Am`bu*la"cral\, a. (Zool.)
   Of or pertaining to ambulacra; avenuelike; as, the ambulacral
   ossicles, plates, spines, and suckers of echinoderms.
   [1913 Webster]