Try Our Apps
Dictionary.com

follow Dictionary.com

Words You've Been Using Wrong

massless

[mas-lis] /ˈmæs lɪs/
adjective, Physics.
1.
pertaining to an elementary particle having zero rest mass, as a photon.
Origin of massless
1875-1880
First recorded in 1875-80; mass + -less
Related forms
masslessness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
Examples from the Web for massless
Historical Examples

Word of the Day

Nearby words for massless

Word Value for massless

10
12
Scrabble Words With Friends