一切經音義 4.158

4.158

縱廣（足容反字書云竪為縱橫為廣又云南北為縱東西為橫是也）。

縱廣 (Length and breadth: The fanqie 足容 [zòng]. The Zishu says: "Vertical is zong, horizontal is guang. It also says that south-to-north is zong, and east-to-west is guang; this is it").