testudon. 龜甲形大盾、掩蔽物迭掩形繃帶、龜甲形繃帶學術名詞陸龜：地球科學、地質學大陸龜：動物學陸龜屬〔E2-Q〕：海洋地質學英文釋義a movable protective covering that provided protection from above; used by Roman troops when approaching the walls of a besieged fortification