sup·pu·ta·tion \ˌsəpyəˈtāshən\noun (-s) Etymology: Middle English, from Latin supputation-, supputatio, from supputatus (past participle of supputare to count up, reckon, from sub- + putare to consider, think) + -ion-, -io -ion — more at pave archaic: the act or process or an instance of calculating : computation, reckoning