FOAL, n. L. pullus; Gr. The primary sense of the verb is to shoot, to cast or throw, to fall. The same verb in Heb. signifies to unite, to fasten. The verb belongs probably to the root of Eng. fall and foul with a different prefix. Foal is literally a shoot, issue, or that which is cast, or which falls.
The young of the equine genus of quadrupeds and of either sex; a colt; a filly.
FOAL, v.t. To bring forth a colt or filly; to bring forth young as a mare or a she-ass.