sexagesimal

adj

1. (not-comparable)Of, related to, or based on the number sixty.

   “The common English divisions of time, longitude, and latitude are all computed using sexagesimal arithmetic.”

   “The first sixty argam form the basis for my own sexagesimal use, in the accounting of my business and in the dimensioning of buildings.”

   “She then supplied a detailed description of the Babylonians, who had relied on a sexagesimal system―counting by sixties, she explained―for both mathematics and astronomy.”

noun

1. A fraction involving division by 60; a sixtieth part of something.

   “Decimals are actually less convenient than sexagesimals for working with most common fractions.”

2. A base-60 number.

   “Babylonian mathematics was computed in sexagesimals.”