The word "calf" has several established meanings in English. Most commonly it denotes the young of certain large mammals—especially cattle—but it is also used for the pair of muscles at the back of the human lower leg and for fine-grained leather made from the hide of young bovines. Each sense has distinct biological, practical and cultural significance.
Young animals
In agriculture and zoology, a calf is a juvenile mammal. The term is applied most often to young cattle but also to the offspring of elephants, whales, giraffes, deer and other large species. Newborn calves are relatively mature in many species but still require parental care or human management until weaning. In farming, care of calves includes feeding (often with colostrum soon after birth), housing, vaccination and gradual transition to solid food. The plural is "calves" and the related verb "to calve" means to give birth; it is also used in glaciology when ice breaks away from an ice shelf or glacier.
Anatomy: the calf of the leg
In human anatomy the calf region contains the gastrocnemius and soleus muscles, together with the deeper plantaris in some people; these muscles merge into the Achilles tendon and act to plantarflex the foot. They are essential for standing, walking, running and jumping. Common problems include strains, cramps and circulatory conditions such as deep vein thrombosis. Prevention and treatment typically involve rest, stretching, strengthening exercises and medical evaluation when pain or swelling is severe.
Calfskin and material uses
Calfskin leather is valued for its softness, fine grain and durability. Historically and today it is used in bookbinding, footwear, gloves and higher-end leather goods. The term "calf" also appears in geographic names for small islands and promontories (for example, "Calf of" followed by a place name) and in compound agricultural terms. Context determines whether discussion concerns neonatal care, muscle function, or leathercraft.