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 资深译员David,毕业于亚洲顶尖的高级翻译学院,擅长翻译有关汽车业的法律文件。