Definition of ruellia
1 capitalized : a very large genus of chiefly tropical American herbs and shrubs (family Acanthaceae) that have showy solitary or paniculate flowers with the simple or 2-lobed style recurved at the apex and the ovary 2-celled
2 plural -s : any plant or flower of the genus Ruellia
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Origin and Etymology of ruellia
New Latin, from Jean Ruel (latinized Ruellius) †1539 French physician and botanist + New Latin -ia
First Known Use: 1751
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