Reflection

Japanese: 反射 - はんしゃ

〘noun〙① A phenomenon in which a wave traveling through a medium hits the boundary with another medium, and part of it travels in a different direction within the original medium. When light, radio waves, heat, sound, etc. hit the surface of an object and travel in the opposite direction. To bounce back. ※Yojishiryaku (1826) 4 "The moon's light reflected off the snow, like bright daylight." ② = han'ei (reflection) ※Bunmeiron no Gyakuryaku (Outline of Civilization) (1875) by Fukuzawa Yukichi, preface "In light of the Western civilization I have acquired in this life, I see its reflections reflected in each other." ③ In medicine, it refers to a certain reaction to a certain stimulus regardless of consciousness or will. "Reflex nerves" "Conditioned reflex" [Igo Ruiju (1872)] ④ Abbreviation of "hansha daimeishi (reflex pronoun)."

Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information

Japanese:

〘名〙① ある媒質の中を進む波が、他の媒質との境界面にぶつかり、その一部がもとの媒質中の異なった方向に進む現象。光・電波・熱・音などが物の表面に当たって、反対の方向に進むこと。はねかえること。※輿地誌略（1826）四「月輝雪上に反射し、明亮なる白昼の如し」② ＝はんえい（反映）※文明論之概略（1875）〈福沢諭吉〉緒言「今生今身に得たる西洋文明に照らして、其形影の互に反射するを見ば」③ 医学で、意識や意志とは無関係に一定の刺激に対して、一定の反応を示すことをいう。「反射神経」「条件反射」〔医語類聚（1872）〕④ 「はんしゃだいめいし（反射代名詞）」の略。

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