| Echometer | n. [ Gr. &unr_;, &unr_;, sound + -meter: cf. F. échomètre. ] (Mus) A graduated scale for measuring the duration of sounds, and determining their different, and the relation of their intervals. J. J. Rousseau. [ 1913 Webster ] |
| Trechometer | n. [ Gr. &unr_; to run + -meter. ] An odometer for vehicles. Knight. [ 1913 Webster ] |