fellatio
/fəˈleɪʃiəʊ/ (bre, ipa) · /fəˈleɪʃiəʊ/ (ame, ipa) · /fə-ˈlā-shē-ˌō fe-/ (ame, mw)
fellatio — noun
1. a type of sexual activity in which one person uses their mouth, lips, or tongue
a type of sexual activity in which one person uses their mouth, lips, or tongue to touch and stimulate a man's penis, usually in order to give him pleasure
The sexual health booklet explained that fellatio is one form of oral sex.
clinical term for this type of oral sex
Qadir and Linnea discussed whether fellatio is common in long-term relationships.
The clinic's leaflet described safe practices during fellatio for couples.
Guillermo asked the nurse whether fellatio can transmit certain infections.
In sex education class, Thandiwe learned about fellatio and other sexual activities.
用法筆記
Clinical or formal register only — avoid in casual conversation, where "oral sex" is the usual term. Using fellatio in everyday speech sounds technical or medical, and may feel awkward or inappropriate depending on the audience.