Usage patterns 〈 乳にゅう 児じ 〉 を 育そだ てる to raise/care for an infant
She is raising an infant by herself.
〈 乳にゅう 児じ 〉 がミルクを 飲の む an infant drinks (formula) milk
The infant drinks milk every three hours.
〈 乳にゅう 児じ 〉 の 世せ 話わ をする to take care of an infant
The mother is busy taking care of the infant.
Kanji 児 newborn babe, child, young of animals Related words· 7 新生児 refers to a newborn within about the first 28 days of life, while 乳児 covers the broader period up to one year old.
幼児 refers to a young child roughly 1 to 6 years old, whereas 乳児 is limited to babies under one year.
赤ちゃん is the everyday, affectionate word for a baby, while 乳児 is the more formal or medical term for an infant under one.
赤ん坊 is a casual, everyday word for a baby, whereas 乳児 is used in formal, medical, or legal contexts.
Show 3 more Show fewer 乳児 is a formal or medical term for an infant used in healthcare and administrative contexts, whereas ベビー is a casual loanword often seen in product branding.
乳児 means infants under one year old, whereas 乳幼児 is the umbrella term that includes 乳児 together with older toddlers/preschoolers.
乳児 is a clinical/legal term specifically for an infant under about one year old, while 幼子 is a warmer, literary word covering a slightly wider age range.
Word family· 8 infancy; babyhood
infant home; residential nursery
suckling infant; nursing baby
infantile eczema; baby eczema
infantile beriberi
Show 3 more Show fewer Etymology Compound of 乳 (milk, breast) and 児 (child, infant). The reading にゅうじ is the on'yomi for both characters.
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