sea slug

noun

1. a nudibranch.

sea slug

noun

1. any of various shell-less marine gastropod molluscs, esp those of the order Nudibranchia See nudibranch

sea slug

1. Any of various colorful marine gastropods of the suborder Nudibranchia, lacking a shell and gills but having fringelike projections that serve as respiratory organs.

2. Also called nudibranch

Word History and Origins

Origin of sea slug¹

First recorded in 1770–80

Example Sentences

He makes the case that, while human brains are marvels of complexity, their fundamental unit, the neuron, isn’t so different from that of sea slugs.

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It was first grouped with squids and octopuses, then with sea slugs, jellyfish ancestors, and even worms.

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And then Roz realized that this type of sea slug was unknown.

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But where the ice is touching the shelf, there are thousands of tiny creatures like coral, sea slugs and sponge.

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Over two decades ago, researchers spotted a mysterious sea slug swimming more than 8,000 feet deep in the Monterey Bay.

Read more on Los Angeles Times