育婴 (yù yīng) literally combines 育 (yù), meaning 'to raise', 'to nurture', or 'to educate', and 婴 (yīng), short for 婴儿 (yīng'ér), meaning 'infant' or 'baby'. Together, the term refers specifically to the comprehensive care of infants — including feeding, hygiene, sleep routines, health monitoring, and early developmental stimulation. It emphasizes professional, science-based practices rather than casual babysitting.

This word is commonly used in formal or semi-formal contexts: parenting classes, hospital neonatal departments, childcare certification programs, and official guidelines from health authorities. While it can appear in everyday conversation among parents discussing caregiving strategies, it carries a more technical and responsible connotation than colloquial terms like 照顾宝宝 (zhàogù bǎobao, 'taking care of the baby'). It implies intentionality, knowledge, and holistic attention to an infant’s physical and emotional needs during the first year of life.