heptagon	(n) /h e1 p t @ g @ n/ /เฮ้ะ ผึ เถอะ เกิ่น/ /hˈeptəgən/
heptagons	(n) /h e1 p t @ g @ n z/ /เฮ้ะ ผึ เถอะ เกิ่น สึ/ /hˈeptəgənz/

WordNet (3.0)

heptagon

(n) a seven-sided polygon

Collaborative International Dictionary (GCIDE)

Heptagon

n. [ Gr. &unr_; sevencornered; "epta` seven + &unr_; angle: cf. F. heptagone.] (Geom.) A plane figure consisting of seven sides and having seven angles. [1913 Webster]

Heptagonal

a. [ Cf. F. heptagonal. ] Having seven angles or sides. [ 1913 Webster ]

Heptagonal numbers (Arith.), the numbers of the series 1, 7, 18, 34, 55, etc., being figurate numbers formed by adding successively the terms of the arithmetical series 1, 6, 11, 16, 21, etc. [ 1913 Webster ]

CC-CEDICT CN-EN Dictionary

七边形	[qī biān xíng, ㄑㄧㄅㄧㄢㄒㄧㄥˊ, 七边形 / 七邊形] heptagon #507,120 [Add to Longdo]
七角形	[qī jiǎo xíng, ㄑㄧㄐㄧㄠˇ ㄒㄧㄥˊ, 七角形] heptagon [Add to Longdo]

EDICT JP-EN Dictionary

七角形	[しちかっけい, shichikakkei] (n) heptagon [Add to Longdo]
七辺形	[しちへんけい, shichihenkei] (n) heptagon; septagon [Add to Longdo]

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