sea slug

American  

noun

1. a nudibranch.

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sea slug British  

noun

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

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sea slug Scientific  

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

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Etymology

Origin of sea slug

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.

From The Wall Street Journal

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

From Science Daily

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

From Literature

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

From BBC

Over the past 20 years, the team has used the institute’s underwater technology to gather more information on the sea slug.

From Los Angeles Times