caliper
/ˈkælɪpə(r)/(亦作calliper)
noun
1
calipers
an instrument for measuring external or internal dimensions, having two hinged legs resembling a pair of compasses and in-turned or out-turned points测径规; 双脚规; 卡钳。
1.1
- （亦作caliper rule）an instrument performing a similar function but having one linear component sliding along another, with two parallel jaws and a vernier scale卡尺。
1.2
- （亦作brake caliper）a motor-vehicle or bicycle brake consisting of two or more hinged components制动卡盘。
2
- （亦作caliper splint）a metal support for a person's leg双角规形夹。
词源
late 16th cent.: apparently an alteration of CALIBRE.