Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

speed of light

Definition of speed of light

  1. :  a fundamental physical constant that is the speed at which electromagnetic radiation propagates in a vacuum and that has a value fixed by international convention of 299,792,458 meters per second —symbol c



1823

First Known Use of speed of light

1823

Rhymes with speed of light

acolyte, aconite, aerolite, Ammonite, Amorite, amosite, anchorite, andesite, anthracite, antiwhite, apartheid, appetite, arsenite, azurite, Bakelite, bedlamite, Benthamite, biotite, bipartite, black-and-white, blatherskite, bleacherite, bring to light, Brooklynite, bryophyte, calamite, Canaanite, candlelight, Carmelite, Castroite, catamite, cellulite, cenobite, chalcocite, chestnut blight, Chinese white, columbite, coprolite, copyright, cryolite, crystallite, disinvite, disunite, divine right, dolerite, dolomite, dynamite, ebonite, epiphyte, eremite, erudite, expedite, extradite, featherlight, fight-or-flight, fly-by-night, gelignite, geophyte, gesundheit, gigabyte, Gilsonite, Hashemite, hematite, hemocyte, hessonite, Hitlerite, Houstonite, hug-me-tight, Hutterite, hyalite, Ibsenite, impolite, inner light, Ishmaelite, Isle of Wight, Israelite, Jacobite, Jerseyite, Josephite, kilobyte, kimberlite, laborite, lazulite, leading light, Leavisite, Leninite, leukocyte, lily-white, localite, lymphocyte, macrophyte, magnetite, malachite, manganite, Marcionite, Masonite, megabyte, Mennonite, Minorite, Moabite, Mr. Right, muscovite, Muscovite, Nazirite, neophyte, oocyte, open sight, out-of-sight, overbite, overflight, overnight, oversight, overwrite, parasite, patent right, perovskite, phagocyte, pilot light, plebiscite, proselyte, Puseyite, pyrrhotite, recondite, reunite, rhyolite, running light, Saint Paulite, saprolite, satellite, Scottish rite, second sight, see the light, self-ignite, serve one right, shergottite, socialite, sodalite, sodomite, spider mite, Stagirite, Sydneyite, taconite, tanzanite, terabyte, time-of-flight, traffic light, transfinite, transvestite, tripartite, troglodyte, Trotskyite, Ulsterite, ultralight, underwrite, urbanite, vigil light, Wahhabite, water right, water sprite, watertight, Wycliffite, xerophyte, yesternight, zoophyte


Learn More about speed of light


Seen and Heard

What made you want to look up speed of light? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 11, 2016

the holder of an office

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image33683556

How much does a batman (the Turkish unit of measurement) weigh?

2.2 pounds 16.96 pounds 196.5 pounds 100 pounds
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ