Meaning

noun any of numerous plants of the genus Plantago; mostly small roadside or dooryard weeds with elliptic leaves and small spikes of very small flowers; seeds of some used medicinally

noun a banana tree bearing hanging clusters of edible angular greenish starchy fruits; tropics and subtropics

noun starchy banana-like fruit; eaten (always cooked) as a staple vegetable throughout the tropics

originInherited from Middle English planteyne, planteyn, from Anglo-Norman plainteine et al., Old French plaintain, from Latin plantāgō, from planta (“sole of the foot”), a nasalized form of Proto-Indo-European *pleth₂- (“flat; to spread”), because of the broad, flat shape of the plantain leaves.

Etymology from Wiktionary, CC BY-SA 3.0