mal·le·a·tion \ˌ ̷ ̷ ̷ ̷ˈāshən\noun (-s) Etymology: Medieval Latin malleation-, malleatio, from malleatus (past participle of malleare to hammer) + Latin -ion-, -io -ion 1.: the action of malleating or state of being malleated 2.: a mark or dent like one made by malleating