Search Result for "light_speed":
Wordnet 3.0

NOUN (1)

1. the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second;
[syn: speed of light, light speed, c]



WordNet (r) 3.0 (2006):

light speed
    n 1: the speed at which light travels in a vacuum; the constancy
         and universality of the speed of light is recognized by
         defining it to be exactly 299,792,458 meters per second
         [syn: speed of light, light speed, c]