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
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Origin and Etymology of alisma
New Latin, from Latin, water plantain, from Greek
First Known Use: 1827
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