出典:Wiktionary
出典:『Wiktionary』 (2025/05/22 12:01 UTC 版)
From Latin septem (“seven”) + Ancient Greek γωνία (gōnía, “angle”), equivalent to septa- + -gon.
Because septagon is formed by combining Latin septem (“seven”), with Ancient Greek γωνία (gōnía, “angle”), it may be considered less correct than heptagon, which has a fully Greek etymology.