Wordnet Synset 15309503-n
http://lila-erc.eu/data/lexicalResources/LatinWordNet/id/LexicalConcept/15309503-n an entity of type: LexicalConcept
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
Wordnet Synset 15309503-n