fellatio
英
/fəˈleɪʃiəʊ/
  
美
/fəˈleɪʃioʊ/
 
n.
吮吸阴茎;口交
牛津词典
noun
[U] (formal) 吮吸阴茎；口交
the practice of touching a man's penis with the tongue and lips to give sexual pleasure

百度翻译对原文进行调整，例句发音部分来自牛津

柯林斯词典
fellatio
1
N-UNCOUNT 口吮阴茎;口交
Fellatio is oral sex which involves someone using their mouth to stimulate their partner's penis.
英英释义
noun

1
oral stimulation of the penis
Synonym:
fellation
数据来源：WordNet