alis·​ma | \ əˈlizmə \

Definition of alisma

1 capitalized : a small genus (the type of the family Alismataceae) of aquatic or semiaquatic herbs with long-petioled often floating leaves and white flowers — see water plantain
2 plural -s : a plant of the genus Alisma

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!

First Known Use of alisma

1827, in the meaning defined at sense 1

History and Etymology for alisma

New Latin, from Latin, water plantain, from Greek

Keep scrolling for more

Learn More about alisma

Time Traveler for alisma

Time Traveler

The first known use of alisma was in 1827

See more words from the same year

Statistics for alisma

Cite this Entry

“Alisma.” Dictionary, Merriam-Webster, Accessed 27 Sep. 2020.

Comments on alisma

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


Test Your Vocabulary

Challenging Vocabulary Quiz Returns!

  • stylized drawing of woman pole vaulting across gap to get trophy
  • Which is a synonym of fuliginous?
Spell It

Can you spell these 10 commonly misspelled words?

Bee Cubed

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

Love words? Need even more definitions?

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