核かく分ぶん裂れつ性せい物ぶっ質しつ

noun

fissile material; fissionable material

Technical term 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核かく分ぶん裂れつ性せい物ぶっ質しつである。

  Uranium-235 is a typical fissile material.