polygon (n.)youdaoicibaDictYouDict[polygon 词源字典]
1570s, from Latin polygonum, from Greek polygonon, noun use of neuter of adjective polygonos "many-angled," from polys "many" (see poly-) + -gonos "angled," from gonia "angle" (see -gon). Related: Polygonal.[polygon etymology, polygon origin, 英语词源]