microalloy noun 2verb 1forms 3 noun2 •An alloy made with very small quantities of elements. •An element used in very small quantities in an alloy.Today, the use of niobium as a microalloy is estimated to account for about 95% of production. — 1992 verb1 •To add elements to an alloy in much smaller quantities than normal.The purpose of this step is to microalloy the aluminum and gold metallizations into the silicon to insure the lowest possible contact resistance […] — 1978 formsmicroalloyed · microalloying · microalloys