noun
major surgery; major operation
Refers to a serious, large-scale surgical procedure, often contrasted with minor or outpatient surgery.
彼は心臓の大手術を受けた。
He underwent major heart surgery.
大手術の後は、長いリハビリが必要だ。
After a major operation, a long rehabilitation is necessary.
Minor surgery; the direct opposite of 大手術.
Compound of 大 (dai, 'big, major') and 手術 (shujutsu, 'surgery').