核かく開かい発はつMeaningsNoun1. nuclear developmentKanji used核nucleus開open発let outComposed of核かくstone (of a fruit); pit; pip; core (of an organization, team, etc.); nucleus; heart; nuclear weapons; nucleus (of an atom); nucleus (of a cell); condensation nucleus; …Noun開かい発はつdevelopment; cultivation; application; exploitation (of resources)Noun