yearling

noun3

1. •
   An animal that is between one and two years old; one that is in its second year (but not yet two full years old).

   • Tom Fettig and his wife, Kim, were there with 60 yearlings, about half of a herd they were helping their son raise on the outskirts of Bismarck. — 2021
2. •
   A racehorse that is considered to be one year old until a subsequent January 1st.
3. •
   (US) A sophomore at West Point military academy.

   • "But is a plebe forbidden to stroll here?" "If a plebe did have the brass to try it," replied Anstey slowly, "I reckon he would have to fight the whole yearling class in turn." — 1910