sea onion

noun

: squill sense 1a

Word History

First Known Use

14th century, in the meaning defined above

Time Traveler

The first known use of sea onion was in the 14th century

See more words from the same century

Browse Nearby Words

sea oats

sea onion

sea orach

See all Nearby Words

Cite this Entry

Style

“Sea onion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sea%20onion. Accessed 2 Jul. 2025.

Copy Citation

Medical Definition

sea onion

noun

sea on·ion -ˌən-yən

: squill sense 1a

More from Merriam-Webster

Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.

Can you solve 4 words at once?

Can you solve 4 words at once?

Word of the Day

galumph

Listen to the pronunciation of galumph

See Definitions and Examples »

Get Word of the Day daily email!

Popular in Grammar & Usage

More Words You Always Have to Look Up

Using Bullet Points ( • )

Should that word have a hyphen?

Words You Always Have to Look Up

Democracy or Republic: What's the difference?

Popular in Wordplay

How 'Namaste' Entered The English Language

12 Lovely and Unusual Words for the Natural World

10 Hella Good U.S. Regionalisms

Better Ways to Say 'This Sucks'

8 Words with Fascinating Histories

Popular

More Words You Always Have to Look Up

How 'Namaste' Entered The English Language

12 Lovely and Unusual Words for the Natural World