eutektse koostise omast väiksema teise komponendi sisaldusega tasakaaluolekus mikrostruktuuris eutektikumi sisaldab sulam (vrd eutektsulam; üleeutektsulam), an alloy system exhibiting a eutectic; any alloy whose composition has an excess of base metal compared with the eutectic composition and whose equilibrium microstructure contains some eutectic structure (compare: eutectic alloy; hypereutectic alloy)