Dictionary.com
Thesaurus.com

figurate number

American  
[fig-yer-it] / ˈfɪg yər ɪt /

noun

Mathematics.

  1. a number having the property that the same number of equally spaced dots can be arranged in the shape of a regular geometrical figure.

Etymology

Origin of figurate number

First recorded in 1605–15

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.