グラム原げん子し

noun

gram atom

Chemistry term: the quantity of an element whose mass in grams is numerically equal to its atomic weight. Now largely replaced by the mole concept, but still encountered in older texts.

• グラム原げん子しは、かつて化か学がくの授じゅ業ぎょうで教おしえられた概がい念ねんだ。

  The gram atom is a concept that was once taught in chemistry classes.