Cone - Pyramidal

Japanese: 錐体 - すいたい

〘Noun〙① A three-dimensional figure made by a closed curve (or broken line) on a plane and the line segments connecting each point inside it to a fixed point outside the plane. The fixed point and its vertices, and the curve (or broken line) on the plane are called its conductor, the line segments connecting points on the conductor and its vertices are called its generatrix, and the conductor and its interior are called its base. When the base is a circle, it is called a cone, and when it is a polygon, it is called a pyramid. Pyramid. ② A protruding part in the shape of ① inside the skull. Inside it is a nerve pathway called the pyramidal tract. ③ = pyramidal body

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

Japanese:

〘名〙① 平面上の閉じた曲線（または折れ線）およびその内部の各点と、平面外の一定点とを結ぶ線分で作られる立体図形。一定点とその頂点、平面上の曲線（または折れ線）をその導線、導線上の点と頂点とを結ぶ線分をその母線、導線およびその内部をその底面という。底面が円のとき円錐、多角形のとき角錐と呼ぶ。錐。② 頭蓋骨の内部にある①の形をした隆起部分。中に錐体路と呼ばれる神経路がある。③ ＝すいじょうたい（錐状体）

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