cub
Synonym discussion
Sense: noun/1
Cub, pup, calf, joey, and kit all refer to baby animals, but each term is tied to specific animal groups. Cub is used for the young of large carnivorous mammals — lions, bears, tigers, and wolves. Pup applies to the young of dogs, seals, foxes, and some rodents. Calf refers to the young of large herd animals such as cows, elephants, whales, and giraffes. Joey is specific to marsupials — kangaroos, koalas, and wallabies carry their young in a pouch. Kit describes the young of foxes, rabbits, beavers, and ferrets. Choose cub when the adult animal is a large predator of the cat, bear, or dog family; for other animals, use the correct specific term. For example: 'The zookeeper bottle-fed the tiger cub.' But: 'The seal pup rested on the rocks.' And: 'The kangaroo joey peeked out of its mother's pouch.'
Etymology
The origin of 'cub' is uncertain. It may come from Old Norse 'kubbr', meaning a young seal or a block of wood, or from Irish 'cub', meaning a young dog. The word entered English in the 1500s and first referred to a young fox, then gradually extended to other young carnivorous mammals. The metaphorical use for an inexperienced person appeared in the 1800s.