ブラウザの設定でJava Scriptの使用を有効にしてご利用ください。
出典:Wiktionary
Borrowed from Medieval Latin ratiō dēcidendī, from ratiō (“reckoning, method, reasoning”) + dēcidendī, genitive singular of dēcidendus, gerund of dēcidere (“to settle”).
ratio decidendi (複数形 rationes decidendi)
ratio decidendi