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JMdict: 1273040
光速 【こうそく】
[n] speed of light
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Kanji in this word:
Kanji
Meanings
On Readings
Kun Readings
光
Ray, Light
コウ
ひか.る, ひかり
速
Quick, Fast
ソク
はや.い, はや-, はや.める, すみ.やか