直ちょく線せん性せいちょくせんせいじ字FuriganaMeanings1nounlinearityTechnical term used in mathematics, physics, and engineering to describe a property of systems, relationships, or functions that are linear.この回かい路ろの直ちょく線せん性せいを測そく定ていする必ひつ要ようがある。