ˈd(y)üpəl adjective
Etymology: Latin duplus — more at double
1.
a. : consisting of two : twofold , double
b. : taken by twos or in groups of two
2.
a. music : having two or a multiple of two beats per measure
duple time
b. of meter : consisting of feet of two syllables
c. of rhythm : consisting of cadences that rise and fall within a span of two syllables