sea slug


: a naked marine gastropod
specifically : nudibranch

Example Sentences

Recent Examples on the Web Elysia, the sea slug, being flat and green, looks like a living leaf. Ed Yong, Discover Magazine, 18 Sep. 2012 For example, kahalalide F—a compound that was isolated from a sea slug and that is being tested against cancers and psoriasis—is created synthetically from DSI. Olive Heffernan, Scientific American, 12 Sep. 2022 Seventeen new species of sea slug have been added to the nudibranch family tree courtesy of efforts from a group of researchers at the California Academy of Sciences. Alison Mackey, Discover Magazine, 5 Nov. 2018 Jake’s disaffected teen son befriends a lonely tulkun, a whale analogue that more closely resembles a giant sea slug. Miles Klee, Rolling Stone, 18 Dec. 2022 The Cal Academy team focuses on a sea slug genus called Hypselodoris. Alison Mackey, Discover Magazine, 5 Nov. 2018 With over 3,000 different species on record, the nudibranch is an extremely versatile kind of sea slug. Courtney Linder, Popular Mechanics, 17 Aug. 2022 And why does the embryo of a marine organism like a sea slug develop differently from that of a sea urchin? David L. Coddon, San Diego Union-Tribune, 7 July 2022 On a beach vacation, a venomous sea slug probably isn’t high on your must-see list. Megan Marples, CNN, 8 Apr. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sea slug.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

1779, in the meaning defined at sense 1

Time Traveler
The first known use of sea slug was in 1779

Dictionary Entries Near sea slug

Cite this Entry

“Sea slug.” Dictionary, Merriam-Webster, Accessed 28 Mar. 2023.

Kids Definition

sea slug

: any of several marine mollusks that have no shell

More from Merriam-Webster on sea slug

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