French Etymology From masturbation + -oire. Pronunciation IPA(key): /mas.tyʁ.ba.twaʁ/ Adjective masturbatoire (plural masturbatoires) (relational) of masturbation; masturbatory Related terms masturber masturbateur masturbation Further reading “masturbatoire”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.Wikiwand - on Seamless Wikipedia browsing. On steroids.