Calves are the young of domestic cattle

Cattle

Cattle are the most common type of large domesticated ungulates. They are a prominent modern member of the subfamily Bovinae, are the most widespread species of the genus Bos, and are most commonly classified collectively as Bos primigenius...

. Calves are reared to become adult cattle, or are slaughtered for their meat, called veal

Veal

Veal is the meat of young cattle , as opposed to meat from older cattle. Though veal can be produced from a calf of either sex and any breed, most veal comes from male calves of dairy cattle breeds...

.
"Calf" is the term used from birth to weaning

Weaning

Weaning is the process of gradually introducing a mammal infant, either human or animal, to what will be its adult diet and withdrawing the supply of its mother's milk.The process takes place only in mammals, as only mammals produce milk...

, when it becomes known as a weaner or weaner calf, though in some areas the term "calf" may be used until the animal is a yearling

Yearling

Yearling may refer to:*Yearling , an animal in its second year of life.**Yearling , a horse between one and two years of age.in titles or proper names:*Yearling Books, an imprint of the publishing company Random House....

. The birth of a calf is known as calving. A calf that has lost its mother is an orphan calf, also known as a poddy or poddy-calf in British English.