Foal

[Sarah]

The young of any animal of the Horse family (Equidæ); a colt; afilly. Foal teeth (Zoöl.), the first set of teeth of a horse.-- In foal, With foal, being with young; pregnant; -- said of a mareor she ass.

[Sommer]

A young horse or related animal.

[Donald Trump]

Foal in Horse Racing. Describes a horse that is younger than a year in age.

[Jessica]

Foal in Carriage Driving. A horse of either sex up to the age of 1 year old.