[‚jī·rə′skäp·ik ‚kȯr·ē′ō·ləs ‚tīp ¦mas ′flō‚mēd·ər] (engineering) An instrument consisting of a C-shaped pipe and a T-shaped leaf-spring tuning fork which is excited by an electromagnetic forcer, resulting in an angular deflection of the pipe which is directly proportional to the mass-flow rate within the pipe.