Also 8 echometre. [f. Gr. ἧχο-ς sound + μέτρον measure; in Fr. échomètre (Littré).] (See quot. 1875.)
1736. Bailey, Echometre.
1875. Brande, Dict. Science, 749. In Music, a sort of scale or rule, marked with lines which serve to measure the duration of sounds, and to ascertain their intervals and ratios.
1881. in Worcester.
