放射性同位核 ほうしゃせいどういかく Meanings Noun radioisotope See also: 放射性同位体 (ほうしゃせいどういたい). Kanji 放 release. Read as ホウ. 射 shoot. Read as シャ. 性 nature. Read as セイ. 同 same. Read as ドウ. 位 rank 核 nucleus. Read as カク. Word lists Physics Jinuma: Japanese Dictionary · Word lists