The plantain is a crop that looks like a large banana. There’s no botanical distinction between a banana and a plantain; they’re both members of the genus Musa which no doubt you’re well familiar with… =)
Plantains are firmer and lower in sugar content than bananas. While bananas in general are eaten raw, plantains usually require cooking or some other kind of processing before you eat them.
Plantains are staple food in the West Indies, and often used the same way as potatoes. They can be cooked and eaten boiled, roasted, mashed, baked or grilled. They can also be chucked into stews, eaten as crisps or turned into nice desserts.