- a shell-less, marine snail of the suborder Nudibranchia, having external, often branched respiratory appendages on the back and sides.
Origin of nudibranch
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for nudibranch
Ancylodoris, the only fresh-water Nudibranch, from Lake Baikal.
Flat against the stone and not easily perceived may be a chiton, a planarian worm, or a nudibranch.
In Doris we find a quite different type of nudibranch from that presented by the two genera Dendronotus and olis.
- any marine gastropod of the order Nudibranchia, characterized by a shell-less, often beautifully coloured, body bearing external gills and other appendagesAlso called: sea slug
C19: from nudi- + branche, from Latin branchia gills
- See sea slug.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.