yearling

plural yearlings

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).

   a yearling lamb

   1 more example

   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 August 25, Henry Fountain, Benjamin Rasmussen, “‘The Worst Thing I Can Ever Remember’: How Drought Is Crushing Ranchers”, in The New York Times, →ISSN

2. A racehorse that is considered to be one year old until a subsequent January 1st.
3. USA sophomore at West Point military academy.

   As a yearling, he admitted to doing his part in ensuring that plebes knew their place at the Academy, […]

   2014, Michael E. Haskew, West Point 1915 (page 57)

   1 more example

   "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, H. Irving Hancock, Dick Prescott's Second Year at West Point, page 84

   Synonyms: yuck