pygmyweed

noun

variants or pigmyweed

ˈ⸗⸗ˌ⸗

: a small annual aquatic herb (Tillaea aquatica) of the family Crassulaceae that occurs along the coasts of North America, Europe, and northern Africa and has very small solitary axillary greenish flowers

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!