JMdict: 2269850

亜光速 【あこうそく】

  1. [n] near light speed; sublight speed
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Kanji in this word:

Kanji Meanings On Readings Kun Readings Grade
Asia, Rank Next, Come After, -ous つ.ぐ
Ray, Light コウ ひか.る, ひかり 2
Quick, Fast ソク はや.い, はや-, はや.める, すみ.やか 3