熱ねつ膨ぼう張ちょう係けい数すうMeaningsNoun1. thermal expansion coefficientKanji used熱heat膨bulge張lengthen係be involved with数numberComposed of熱ねつheat; fever; temperature; zeal; passion; enthusiasm; mania; craze; rageNoun膨ぼう張ちょうexpansion; swelling; increase; growthNoun係けい数すうcoefficient; factor; proportional constant; modulusNoun