conductivity
導電率
解説 Definition
物質が電気を通す能力や程度。材料の電気伝導性を示す物理的性質。
Conductivity is the ability of a material to let electricity or heat pass through it. This word is mainly used in science and engineering when comparing how well different materials carry energy.
覚え方のコツ Memory Tip
conductivity は conduct → conductive → conductivity の形で押さえると覚えやすい。conduct は「導く・運ぶ」の核を持ち、conductor は電気を通す物、conductive は「電気を通しやすい」、-ity が付くと「その性質」。つまり electrical conductivity は「電気を通す性質・導電率」です。high/low conductivity, electrical conductivity の形で頻出する。conduct には「行う」「指揮する」もあるので、材料・電気の文脈では「電気の通しやすさ」へ切り替える。resistivity と対で見るとさらに定着しやすい。
`Conductivity` comes from `conduct`, meaning to carry or let something pass through. In science, it often appears in `high electrical conductivity` or `measure conductivity`, especially with words like `copper`, `metal`, or `semiconductor.` Remember it together with its opposite-side partner `resistivity`, so the meaning stays clear.
例文
Copper has high electrical conductivity, making it ideal for wiring.
銅は高い導電率を持っており、配線に理想的です。
The conductivity of the solution changed as we added ions.
イオンを追加するにつれて溶液の導電率が変わった。
Engineers measured the conductivity of each metal sample.
技術者たちは各金属サンプルの導電率を測定した。
conductivity の類義語・関連語
conductivity の語源・成り立ち Etymology
conductivity はラテン語 conducere（con-「共に」+ ducere「導く」）に由来し、conductive＋-ity で「導く性質」。conductor や induce も同じ ducere 系で、語の芯には「先へ導いて運ぶ」像がある。だから電気や熱の通しやすさを表す。
Conductivity is built from conductive and the suffix -ity, and it goes back to Latin conducere, from con- meaning "together" and ducere meaning "to lead." The central idea is "leading something along." Related words such as conductor and induce share the same ducere root.
外部辞書で調べる
この単語を英単語クイズで覚えよう