tertiaglossary / TERTIA tertia (t[schwa]r-shee-[schwa]), n. Hist. A third. • A widow’s terce was usu. referred to as tertia rationabilis (“a reasonable third”). 词条贡献者 法律翻译玉晶,毕业于英国一流的高级翻译学院,专注翻译各类与通用数据保护条例有关的法律文件。