Unison

(Lat. uni so‘nus; Ger. Unison’; Fr, uni on; It. uni’so no.) Properly, a tone of the same pitch as a given tone; by extension, a higher or lower octave of a given tone; as a//'unisono (It.), /'uni on (Fr), in unison, at the unison, progre ing in unison’ (in this latter sense often found in scores, as where a double-ba part is written out and the ‘cello has merely the direction cof ba o all’ unisono [c. B. all unisono], i. e., the same part an octave higher).—Also, in the pianoforte, a group of 2 or 3 strings struck by one hammer and yielding one tone; one such string is called a wnison-string.— Finally, sometimes equiv. to Prime.