出典:Wiktionary
From translingual Polygonum, from the neuter of Ancient Greek πολύγωνος (polúgōnos, “polygonal”), from πολυ- (polu-, “many, much”) + γωνία (gōnía, “corner, angle”), so called in allusion to the numerous joints. Doublet of polygon.
polygonum (複数形 polygonums または polygona)
From Ancient Greek πολύγωνον (polúgōnon).