The Collaborative International Dictionary of English v.0.48:
Plantain \Plan"tain\, n. [Cf. F. plantain-arbre, plantanier, Sp.
pl['a]ntano, pl['a]tano; prob. same word as plane tree.]
1. (Bot.) A treelike perennial herb (Musa paradisiaca) of
tropical regions, bearing immense leaves and large
clusters of the fruits called plantains. See Musa.
2. The fruit of this plant. It is long and somewhat
cylindrical, slightly curved, and, when ripe, soft,
fleshy, and covered with a thick but tender yellowish
skin. The plantain is a staple article of food in most
tropical countries, especially when cooked.
Plantain cutter, or Plantain eater (Zool.), any one of
several large African birds of the genus Musophaga, or
family Musophagid[ae], especially Musophaga violacea.
See Turaco. They are allied to the cuckoos.
Plantain squirrel (Zool.), a Java squirrel (Sciurus
plantani) which feeds upon plantains.
Plantain tree (Bot.), the treelike herb Musa paradisiaca.
See def. 1 (above).