What is the fruit of certain grasses which furnish the chief food of man, as corn, wheat, rye, oats, etc., or the plants themselves; -- used collectively. Storehouses crammed with grain. Shak called?

grain — The fruit of certain grasses which furnish the chief food of man, as corn, wheat, rye, oats, etc., or the plants themselves; -- used collectively. Storehouses crammed with grain. Shak. (Webster's 1913.)