marsh felwort

noun

: an annual herb (Lomatogonium rotatum) of the family Gentianaceae that occurs in marshes and wet places in Eurasia and North America and that has narrow opposite leaves and conspicuous blue or white flowers in terminal racemes

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!