genitalia (n.)youdaoicibaDictYouDict[genitalia 词源字典]
"the genital organs," 1876, Modern Latin, from Latin genitalia (membra), neuter plural of genitalis "genital, pertaining to generation or birth" (see genital). The Latin word also yielded, with change of suffix, French génitoires (12c.), hence Middle English and early Modern English genitors "genitals."[genitalia etymology, genitalia origin, 英语词源]