Definitions for acanthaceae
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Princeton's WordNet
Acanthaceae, family Acanthaceae, acanthus family(noun)
widely distributed herbs and shrubs and trees; sometimes placed in the order Scrophulariales
U.S. National Library of Medicine
Acanthaceae
A plant family of the order Scrophulariales, subclass Asteridae, class Magnoliopsida. It is characterized by simple leaves in opposite pairs, cystoliths (enlarged cells containing crystals of calcium carbonate), and bilaterally symmetrical and bisexual flowers that are usually crowded together. The common name for Ruellia of wild petunia is easily confused with PETUNIA.
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