General term for a specific part or section of something, often used in technical or formal descriptions.
Look at a part of the machine magnified.
affected part; affected area
Medical term for a specific part of the body that is diseased or injured; often used in phrases like 局部麻酔 (local anesthesia).
Euphemistic term for the genital area; used in medical, educational, or polite contexts.
This map shows only a section of the city.
The doctor disinfected only the affected area.
I had surgery under local anesthesia.
It is important to keep your private parts clean.
The illustrated reference book also explains the human genitals.
全身 (systemic, whole-body) contrasts with 局部 (a localized part), as in 全身麻酔 vs 局部麻酔.
Compound of 局 (limited, local) and 部 (part, section). The meaning 'private parts' developed as a euphemistic extension of 'local part'.