Where does “rectovestibular” come from?

rectovestibular (English) comes from English vestibular, from English -ar, from Middle English -ar, from Old English -ere, from Proto-West Germanic -ārī, from Proto-Germanic -ārijaz, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

rectovestibular (English): Relating to the rectum and the vestibule

Definitions

  1. Relating to the rectum and the vestibule

Ancestry of “rectovestibular”, step by step

rectovestibular traces back through two separate lines of ancestry.

via English vestibular

StepLanguageWordMeaning
1EnglishvestibularOf or pertaining to a vestibule in a building; Of...
2English-arOf, near, or pertaining to; Forming nouns such as...
3Middle English-ar
4Old English-eremasculine agent suffix, originally applied only...
5Proto-West Germanic-ārī-er
6Proto-Germanic-ārijaz-er
7Latin-āriuser
8Proto-Italic*-āziosForms relational adjectives to nouns (and rarely numerals)

via English recto

StepLanguageWordMeaning
1EnglishrectoThe front side of a flat object which is to be...
2Latinrectodirectly; dative masculine singular of rēctus;...
3Latinrēctusled straight along, drawn in a straight line, straight, upright
4Latinregōto rule, govern, direct
5Proto-Italicregō
6Proto-Indo-Europeanh₃réǵetito be straightening, to be setting upright
7Proto-Indo-Europeanh₃reǵ-to straighten, to right oneself; right; just
Every word from Proto-Italic *-āziosEvery word from Latin -āriusEvery word from English -ar