prolatio

(from the article `mensural notation`) ...divisions of time: modus, division of the longa () into two or three breves ({breve}); tempus, division of the breve into two or three semibreves ...
Found on http://www.britannica.com/eb/a-z/p/120

prolatio

a bringing forward, mentioning / extension / deferring.
Found on https://www.math.ubc.ca/~cass/frivs/latin/latin-dict-full.html

prolatio

Latin, meaning: a bringing forward, mentioning / extension / deferring.
Found on http://archives.nd.edu/ppp.htm
No exact match found