cal·li·per noun (BrE) (also cali·per NAmE, BrE ) BrE /ˈkælɪpə(r)/ 🔊NAmE /ˈkælɪpər/ 🔊callipers [plural] an instrument with two long thin parts joined at one end, used for measuring the diameter of tubes and round objects (= the distance across them) 卡钳，测径器，两脚规，卡尺（用于测量管子、圆形物体的直径）◆a pair of callipers一把测径规(BrE) (NAmE brace) [countable, usually plural] a metal support for weak or injured legs 双脚规形夹（支撑无力或受伤的腿的金属支架）