The term CRIB DWELLER can be broken down into three crossword solutions: BABY (4 letters), INFANT (6 letters), and BABE (4 letters). A BABY is a very young human, usually under one year old, who is still dependent on its parents or guardians for care. An infant is a BABY up to 12 months old. A BABE is an informal term for a BABY or young child. Therefore, a CRIB DWELLER is someone who is a very young human, usually under one year old, who lives in a crib.