spintrian

From Latin spintria (“male prostitute”), from Ancient Greek σφιγκτήρ (sphinktḗr, “something which binds”), referring to the anal sphincter.

• IPA^(key): /ˈspɪntɹɪən/

spintrian (comparative more spintrian, superlative most spintrian)

1. Of or pertaining to sex or fornication (especially homosexual) between three or more people.
   • 2001, Bette Talvacchia, Taking positions: on the erotic in Renaissance culture‎, →ISBN, page 250:

     There is a Pompeiian fresco with a spintrian grouping of three, composed of a heterosexual couple similar to that in scenes 7-15 (see n.48, above) with the addition of a male-male joining; see Maulucci Vivolo, Pompei i graffiti, 118.