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Alternative spelling
抛物線

Japanese Wikipedia has an article on:

放物線

Wikipedia ^ja

English Wikipedia has an article on:

Parabola

Wikipedia

From earlier 抛物線. 放 (hō, “to release, to set free”) is a daiyōji replacing 抛 (hō, “to throw, to hurl”). From Chinese 拋物線／抛物线 (pāowùxiàn).

放(ほう)物(ぶつ)線(せん) • (hōbutsusen) ^{←はうぶつせん (faubutusen)^?}

^ Matsumura, Akira, editor (2006), 大辞林 [Daijirin] (in Japanese), Third edition, Tokyo: Sanseidō, →ISBN
↑ ^2.0 ^2.1 ^2.2 NHK Broadcasting Culture Research Institute, editor (1998), NHK日本語発音アクセント辞典 [NHK Japanese Pronunciation Accent Dictionary] (in Japanese), Tokyo: NHK Publishing, Inc., →ISBN
^ Kindaichi, Kyōsuke et al., editors (1997), 新明解国語辞典 [Shin Meikai Kokugo Jiten] (in Japanese), Fifth edition, Tokyo: Sanseidō, →ISBN

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 ===Etymology===
+From earlier {{m|ja|抛物線}}. {{ja-daiyouji|sort=ほうぶつせん|放|tr1=hō|t1=to [[release]], to [[set free]]|抛|tr2=hō|t2=to [[throw]], to [[hurl]]}}. From {{bor|ja|zh|拋物線}}.
-Appears to be a {{calque|nocap=1|ja|en|sort=ほうぶつせん|parabola}}, or possibly of the same term ''[[parabola]]'' from a different donor language, as a compound of {{compound|ja|抛物|tr1=hōbutsu|pos1=literally “throwing thing”, seemingly in reference to the etymology of ''[[parabola#Etymology|parabola]]''|線|tr2=sen|t2=[[line]]}}.
-First used in an 1886 [[glossary]] of [[engineering]] terms.<ref name="KDJ">{{R:Kokugo Dai Jiten}}</ref>
-{{ja-daiyouji|sort=ほうぶつせん|放|tr1=hō|t1=to [[release]], to [[set free]]|抛|tr2=hō|t2=to [[throw]], to [[hurl]]}}.
 ===Pronunciation===