液えき相そう線せんえきそうせんMeanings1nounliquidusphysicsTechnical term in physics and materials science: the line on a phase diagram above which a substance is completely liquid.この合ごう金きんの液えき相そう線せん温おん度どは約やく1100度どです。The liquidus temperature of this alloy is about 1100 degrees.