A colt or filly under a year of age. If still with its dam, it is a suckling foal; if weaned, it is termed a weanling, or weanling foal. For more precise identification, it is either a colt foal, suckling colt, or weanling colt, or filly foal, etc., as the case may be.
1) A horse of either sex in its first year of life. 2) As a verb, to give birth. Also known as "dropped." 3) Can also denote the offspring of either a male or female parent She is the last foal of Secretariat.
Horses, either male or female, who have yet to reach their first official birthday. All thoroughbreds in the Northern Hemisphere have an automatic birthday of 1st January, regardless of the date they were actually born.
Horse of either sex from the time of its birth until 1 January the following year. All racehorses are given the nominal birthday of January 1st. Thus a "two-year-old" born in June and one born in January of the same year are considered to be of the same age for the purposes of satisfying the conditions of some races re: weight carried. In reality, the January horse may be considered to have a significant advantage in terms of physical development at this early stage in its caree.