fideicommissary heirglossary / fideicommissary heir (fI-dee-I-kom-i-sair-ee).Roman & civil law A beneficiary of property who succeeds the direct (original) heir. See FIDEICOMMISSUM. 词条贡献者 法律翻译William,毕业于法国一流的高级翻译学院,擅长翻译有关农业和食品领域的法律文件。