pendecagonn.

Brit.

/pɛnˈdɛkəɡ(ə)n/,

/pɛnˈdɛkəɡɒn/, U.S.

/pɛnˈdɛkəˌɡɑn/

Forms: 1600s pendecagone, 1700s 1900s– pendecagon.

Origin: Apparently a borrowing from Greek, combined with an English element. Etymons: Greek πέντε , decagon n.

Etymology: Apparently irregularly < pen- (in ancient Greek πέντε five: see penta- comb. form) + decagon n. Compare post-classical Latin pentedecagonum (1699 in the passage translated in quot. 1709), Hellenistic Greek πεντεκαιδεκάγωνον . Compare earlier quindecagon n., dodecagon n.

Geometry. rare.

A plane figure having fifteen straight sides and fifteen angles; a quindecagon.

ΘΚΠ

the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > with ten or more sides or angles

quindecagon1570

quindecangle1636

hendecagon1649

decagona1652

dodecagon1658

quatuordecangle1667

myriagon1674

chiliagon1692

pendecagon1695

undecagon1728

1695 W. Alingham Geom. Epitomiz'd 95 It is also necessary to inscribe a pentagone in a Circle, as also a pendecagone.

1709 G. Vaux tr. J. C. Sturm Mathesis Juvenilis I. iii. i. 248 From the Sides of a Trigon, Tetragon, Pentagon, Octagon, Decagon, Dodecagon, and Pendecagon [L. pentedecagoni]; every one of which Sides being to be express'd by the same parts of the Radius, are not so easily known.

1998 Independent 6 Jan. (Network Plus section) 7/4 Most names for large numbers of sides are not used: a 27-sided shape is just called ‘a 27-sided polygon’—apart from the 15-sided pendecagon/quindecagon and 100-sided chiliagon.

This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022).

单词	pendecagon
释义	pendecagonn. Brit. /pɛnˈdɛkəɡ(ə)n/, /pɛnˈdɛkəɡɒn/, U.S. /pɛnˈdɛkəˌɡɑn/ Forms: 1600s pendecagone, 1700s 1900s– pendecagon. Origin: Apparently a borrowing from Greek, combined with an English element. Etymons: Greek πέντε , decagon n. Etymology: Apparently irregularly < pen- (in ancient Greek πέντε five: see penta- comb. form) + decagon n. Compare post-classical Latin pentedecagonum (1699 in the passage translated in quot. 1709), Hellenistic Greek πεντεκαιδεκάγωνον . Compare earlier quindecagon n., dodecagon n. Geometry. rare. A plane figure having fifteen straight sides and fifteen angles; a quindecagon. ΘΚΠ the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > with ten or more sides or angles quindecagon1570 quindecangle1636 hendecagon1649 decagona1652 dodecagon1658 quatuordecangle1667 myriagon1674 chiliagon1692 pendecagon1695 undecagon1728 1695 W. Alingham Geom. Epitomiz'd 95 It is also necessary to inscribe a pentagone in a Circle, as also a pendecagone. 1709 G. Vaux tr. J. C. Sturm Mathesis Juvenilis I. iii. i. 248 From the Sides of a Trigon, Tetragon, Pentagon, Octagon, Decagon, Dodecagon, and Pendecagon [L. pentedecagoni]; every one of which Sides being to be express'd by the same parts of the Radius, are not so easily known. 1998 Independent 6 Jan. (Network Plus section) 7/4 Most names for large numbers of sides are not used: a 27-sided shape is just called ‘a 27-sided polygon’—apart from the 15-sided pendecagon/quindecagon and 100-sided chiliagon. This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022). < n.1695
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