nu·di·branch /ˈnudəˌbræŋk, ˈnju-/
  Nu·di·branch a. Zool. Of or pertaining to the Nudibranchiata. -- n. One of the Nudibranchiata.
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  nudibranch
       n : any of various marine gastropods of the suborder
           Nudibranchia having a shell-less and often beautifully
           colored body [syn: sea slug]