sea slug

noun

a nudibranch.

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Origin of sea slug

First recorded in 1770–80

Words nearby sea slug

sea scorpion, sea scout, sea serpent, sea shanty, sea slater, sea slug, sea snail, sea snake, sea spider, sea squab, sea squill
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

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British Dictionary definitions for sea slug

sea slug

noun

any of various shell-less marine gastropod molluscs, esp those of the order NudibranchiaSee nudibranch
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for sea slug

sea slug

Any of various colorful marine gastropods of the suborder Nudibranchia, lacking a shell and gills but having fringelike projections that serve as respiratory organs. Also called nudibranch
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.