n. [ Gr. &unr_; backwards + -meter. ] An instrument with a revolving wheel for measuring a curved line, as on a map. [ 1913 Webster ]
n. [ L. spirare to breathe + -meter. ] An instrument for measuring the vital capacity of the lungs, or the volume of air which can be expelled from the chest after the deepest possible inspiration. Cf. Pneumatometer. [ 1913 Webster ]