Definitions

1. adjective

relating to or based on twenty, especially as a base in numeral systems

“The vigesimal system used by the ancient civilization has been a subject of interest among historians.”

2. noun

a numeral system based on twenty as the primary base, often used historically in European cultures

“The vigesimal numeral system of the old Norse people is still studied by anthropologists today.”

3. noun

a number in a vigesimal system

“The vigesimal number 34 in the old European numeral system translates to 3 sets of 20 and 14 units.”