What is abradant,a abrasion,abrasive & abrasive process

Abradant is a material generally in power, for grinding. The term includes emery ,sand ,glass, and many other materials Such as all abrasive particals As the name suggests abradant and abrasive both sound alike Abrasion: abrasion is the process or the act of rubbing away Abrasive: in mechanics ,an agent employed in grinding or wearing away by friction or attrition . The more common materials for this purpose are emery , powdered glass and sand. Abrasive process: abrasive cutting is performed by means of stones ,sand , emery,glass, corundum,carburundum,chilled globulus of iron ,and in some cases by soft ,fraiable iron alone