pro·​la·​tion | \ prōˈlāshən\
plural prolations

Definition of prolation

1 obsolete : utterance the prolation of the words of benediction— John Lloyd
2 or prolatio, music : the relationship between the semibreve and the minim in mensural notation

Note: In major prolation the semibreve is divided into three minims, whereas in minor prolation it is divided into two.

— compare modus, tempus

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First Known Use of prolation

14th century, in the meaning defined at sense 1

History and Etymology for prolation

Latin prolation-, prolatio, from prolatus + -ion-, -io -ion

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The first known use of prolation was in the 14th century

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