Definition of plantain
: any of a genus (Plantago of the family Plantaginaceae, the plantain family) of herbs with basal rosettes of usually lanceolate or elliptical leaves and spikes of minute greenish flowers
PLANTAIN Defined for Kids
Definition of plantain for Students
: the greenish fruit of a kind of banana plant that is eaten cooked and is larger, less sweet, and more starchy than the ordinary banana
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