duplet
/ˈdjuːplɪt/noun
1- a set of two things(物品的)一对, 一双。
1.1
- Music a pair of equal notes to be performed in the time of three【乐】二连音。
词源
mid 17th cent. (as a dicing term in the sense of doublets (see DOUBLET): from Latin duplus 'duple', on the pattern of doublet. Current senses date from the 1920s.