octagon
/ˈɒktəɡ(ə)n//ˈɑktəˌɡɑn/
- n.
- 八边形，八角形
中文释义来自 ECDICT
构词拆解
词源链
- 通用希腊语Koine Greek约前 300–公元 300 年
ὀκτάγωνος‘having eight corners’
词源说明
From Latin octagōnon, octōgōnon (“octagon”), and from its etymon Ancient Greek ὀκτάγωνον (oktágōnon, “octagon”), probably from Koine Greek ὀκτάγωνος (oktágōnos, “having eight corners”) + -ον (-on, suffix forming nouns). ὀκτάγωνος is derived from ὀκτᾰ- (oktă-, prefix meaning ‘eight’) (from ὀκτώ (oktṓ, “eight”), ultimately from Proto-Indo-European *oḱtṓw (“eight”)) + γωνία (gōnía, “angle; corner”) (probably ultimately from Proto-Indo-European *ǵónu (“knee”)); analysable as octa- + -gon. The English word is cognate with Middle French octogone (modern French octogone), Italian octagono (obsolete), ottagono, Spanish octágono, octógono.
Sense 2 (“arena for mixed martial arts”) refers to its shape.
释义
名词noun
- 1(geometry, also attributively) A polygon with eight sides and eight angles.
- 2(martial arts) An arena for mixed martial arts.