infant; suckling baby
Refers specifically to a baby under one year old, often emphasizing the nursing stage. In medical or legal contexts, the age cutoff may be defined precisely.
乳児は母乳だけで育つこともある。
An infant can sometimes be raised on breast milk alone.
この病院には乳児用の特別なケアがある。
This hospital has special care for infants.
She is raising an infant by herself.
The infant drinks milk every three hours.
The mother is busy taking care of the infant.
infantile eczema; baby eczema
infantile beriberi