spring scale
weighing scale; consists of spring fixed at one end with a hook to attach an object at the other;works by Hooke's Law (the scale markings on the spring balance are equally spaced); can not measure mass, only weight
en-US/ˈspɹɪŋ ˈskeɪl/
en-GB/ˈspɹɪŋ ˈskeɪl/