USURAE CENTESIMAE

usurae centesimae (yoo-s[y]oor-ee [or yoo-z[y]oor-ee] sen-tes-[schwa]-mee). [Latin] Interest at the rate of 12% per year (1% per month), normally the highest rate allowed by law. • The Romans calculated interest rates by dividing the principal sum into one hundred parts, with one part being payable monthly as interest.