heptagonn.

/ˈhɛptəɡən/

Etymology: < Greek ἑπτάγωνον, neuter of ἑπτάγωνος seven-cornered. Compare French heptagone (1542 in Hatzfeld & Darmesteter).

a. Geometry. A plane figure having seven angles and seven sides.

ΘΚΠ

the world > space > shape > angularity > specific angular shape > [noun] > polygon > heptagon

septangle1551

heptagon1570

the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > heptagon

septangle1551

heptagon1570

septagon1616

1570 H. Billingsley tr. Euclid Elements Geom. i. f. 42 In an heptagon, from one angle may be drawne lines to foure opposite angles.

1660 tr. I. Barrow Euclide's Elements iv. 85 The side of a Heptagone.

1885 C. Leudesdorf tr. L. Cremona Elements Projective Geom. 187 Suppose it is required to inscribe in the conic a heptagon.

b. Fortification. A place strengthened with seven bastions for its defence.

ΚΠ

1706 in Phillips's New World of Words (new ed.)

2. attributive or adj.= heptagonal adj.

ΚΠ

1775 R. Putnam in B. Romans Conc. Nat. Hist. E. & W. Florida 335 It [a fort] was built of a heptagon figure, with one side fronting the river.

This entry has not yet been fully updated (first published 1898; most recently modified version published online September 2018).

单词	heptagon
释义	heptagonn. /ˈhɛptəɡən/ Etymology: < Greek ἑπτάγωνον, neuter of ἑπτάγωνος seven-cornered. Compare French heptagone (1542 in Hatzfeld & Darmesteter). 1. a. Geometry. A plane figure having seven angles and seven sides. ΘΚΠ the world > space > shape > angularity > specific angular shape > [noun] > polygon > heptagon septangle1551 heptagon1570 the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > heptagon septangle1551 heptagon1570 septagon1616 1570 H. Billingsley tr. Euclid Elements Geom. i. f. 42 In an heptagon, from one angle may be drawne lines to foure opposite angles. 1660 tr. I. Barrow Euclide's Elements iv. 85 The side of a Heptagone. 1885 C. Leudesdorf tr. L. Cremona Elements Projective Geom. 187 Suppose it is required to inscribe in the conic a heptagon. b. Fortification. A place strengthened with seven bastions for its defence. ΚΠ 1706 in Phillips's New World of Words (new ed.) 2. attributive or adj.= heptagonal adj. ΚΠ 1775 R. Putnam in B. Romans Conc. Nat. Hist. E. & W. Florida 335 It [a fort] was built of a heptagon figure, with one side fronting the river. This entry has not yet been fully updated (first published 1898; most recently modified version published online September 2018). < n.1570
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