Center line - Center line

Japanese: 中線 - ちゅうせん

〘Noun〙① A line segment that connects the vertex of a triangle with the midpoint of its opposite side. ※Rekisho Shinsho (1798-1802), lower half: "It is compared to the horizontal line to the right of the median line (abbreviated)." ② Refers to the equator. ※Ensei Kansho Zusetsu (1823), upper half: "The median line (Chinese name: equator)." ③ The central railway line. ※Beio Kairan Jikki (1877), Kume Kunitake, 1: "The median line goes to Dismons, the southern line goes to Saint Luyi, and the northern line goes to Chicago ."

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

Japanese:

〘名〙① 三角形の頂点とその対辺の中点とを結ぶ線分。※暦象新書（1798‐1802）下「中線の右の横線八〈略〉に比せり」② 赤道をいう。※遠西観象図説（1823）上「中線〈漢名、赤道〉」③ 中央の線路。※米欧回覧実記（1877）〈久米邦武〉一「中線は『ヂスモンス』に赴き、南線は聖路易に赴き、北線は即ち市高俄(チカゴ)に赴く」

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