follow Dictionary.com

What is the X in X-mas?

Descartes' law

noun, Optics.
Origin
named after René Descartes
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source

Word of the Day

Difficulty index for Descartes' law

Few English speakers likely know this word

Word Value for descartes

0
0
Scrabble Words With Friends