Library / English Dictionary

    LIGHT SECOND

    Pronunciation (US): Play  (GB): Play

     I. (noun) 

    Sense 1

    Meaning:

    The distance light travels in a vacuum in one second; approximately 300,000 kilometersplay

    Classified under:

    Nouns denoting quantities and units of measure

    Hypernyms ("light second" is a kind of...):

    astronomy unit (a linear unit used for astronomical distances)

    Holonyms ("light second" is a part of...):

    light-year; light year (the distance that light travels in a vacuum in 1 year; 5.88 trillion miles or 9.46 trillion kilometers)

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