乳にゅう糖とう不ふ耐たい症しょう

にゅ

う

と

う

ふ

た

い

しょ

う

Meanings

1

noun

lactose intolerance

medicine

Medical term for the inability to digest lactose, often due to lactase deficiency.

乳にゅう糖とう
乳糖 is lactose, the sugar found in milk; 乳糖不耐症 is the condition of being unable to digest it.
不ふ耐たい症しょう
不耐症 means intolerance (to a substance); 乳糖不耐症 specifically refers to lactose intolerance.

Compound of 乳糖 (lactose) + 不耐症 (intolerance). A straightforward medical term.