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二重水素 (にじゅうすいそ) Japanese meaning | Kotomora

二に重じゅう水すい素そ

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Meanings

1

noun

deuterium; heavy hydrogen

chemistry

Technical term in chemistry for the stable isotope of hydrogen with one proton and one neutron. Often contrasted with 三重水素 (tritium).

See also: 重水素

二に重じゅう水すい素そは核かく融ゆう合ごう反はん応のうに使つかわれる。
Deuterium is used in nuclear fusion reactions.

水みずの中なかにはごくわずかな二に重じゅう水すい素そが含ふくまれている。

A very small amount of deuterium is contained in water.

Kanji

二two, two radical (no. 7)
重heavy, important, esteem
水water
素elementary, principle, naked

Similar words

重じゅう水すい素そ
重水素 is a shorter synonym for deuterium, also used in chemistry. 二重水素 explicitly includes the 'double' (二重) component, emphasizing the isotope's mass number of 2.
三さん重じゅう水すい素そ
Tritium, the radioactive isotope of hydrogen with one proton and two neutrons. 二重水素 is stable, while 三重水素 is radioactive.

Etymology

Compound of 二重 (double) and 水素 (hydrogen), referring to the isotope with mass number 2. The term is a direct calque of the English 'heavy hydrogen' or 'deuterium'.