Back
English Dictionary
Learn English
Learn grammar
List of words
Study your cards
Hang On, Man!
Audio Books
More apps
SPONSORED LINKS
Recent searches
1990s
arbitrate
barque
SPONSORED LINKS
SPONSORED LINKS
constrict
pipe cutter
complacent
beaver
declaration
cuckoo bread
red crescent
Hide translation
light speed
light speed
/ˈlaɪt spiːd/
noun
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
(
c
,
light speed
,
speed of light
)
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
Back
Next
Language