分ぶん裂れつ物ぶっ質しつ

noun

fissionable material

Technical term used in nuclear physics and engineering; refers to substances capable of sustaining a nuclear fission chain reaction.

• ウラン235は代だい表ひょう的てきな分ぶん裂れつ物ぶっ質しつです。

  Uranium-235 is a typical fissionable material.