External division point

…The figure formed by all the points of l that are not included in the line segment AB is called the extension of the line segment AB. The internal points of the line segment AB are also called the internal division points of the line segment AB, and the points that belong to the extension of the line segment AB are called the external division points of the line segment AB. The line segment AB can have two possible directions: from A to B, and from B to A. …

*Some of the terminology explanations that mention "external division point" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…線分ABに含まれないlの点全体のつくる図形を線分ABの延長という。線分ABの内点はまた線分ABの内分点とも呼ばれ，線分ABの延長に属する点は線分ABの外分点と呼ばれる。線分ABには，AからBに向かう向きと，BからAに向かう向きの二つの向きが考えられる。…

※「外分点」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報