Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

toothcup

noun

Definition of toothcup 

1 : a low-growing North American herb (Rotala ramosior) found on sandy shores and having solitary flowers and regularly splitting capsules

2 : a low herb (Ammania coccinea) of the family Lythraceae chiefly found in southern U.S. and having narrow leaves and flowers in clusters of two, three, or several in the leaf axils

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!

Learn More about toothcup

Statistics for toothcup

Look-up Popularity

Comments on toothcup

What made you want to look up toothcup? Please tell us where you read or heard it (including the quote, if possible).

Show Comments  Hide Comments 

WORD OF THE DAY

henchman

a trusted follower

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Vocab Quiz

  • the-education-of-achilles-eugne-delacroix
  • Which is a synonym of discomfit?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play

Ask the Editors

Word Games