Welsh onion

noun

: an Asiatic onion (Allium fistulosum) with tufted glabrous foliage and slender bulbs that is sometimes cultivated for its leaves which are used in seasoning and its bulbs which are used as early green onions

Word History

First Known Use

1731, in the meaning defined above

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!