mastology

[Gr. mastos =the breast, and logos a discourse, a treatise.) A treatise or history of animals which suckle their young. măs-tür-bā'-tion, *mas-tu-prā'-tion, s . [Fr. masturbation, mast up ration , from Lat. masturba tus , pa. par. of masturbo = to practice onanism, prob. from manus =the hand, and stuprum defilement; Sp. masturbacion ; Ital. mast urb azione , mas tuprazione.] Onanism; self-defilement.