Nudibranch

from WordNet (r) 3.0 (2006)

nudibranch
    n 1: any of various marine gastropods of the suborder
         Nudibranchia having a shell-less and often beautifully
         colored body [syn: {sea slug}, {nudibranch}]

from The Collaborative International Dictionary of English v.0.48

Nudibranch \Nu"di*branch\, a. (Zool.)
   Of or pertaining to the Nudibranchiata. -- n. One of the
   Nudibranchiata.
   [1913 Webster]

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