hendecagonn.

Brit.

/hɛnˈdɛkəɡ(ə)n/,

/hɛnˈdɛkəɡɒn/, U.S.

/hɛnˈdɛkəˌɡɑn/

Forms: 1600s hendecagone, 1600s–1700s endecagone, 1600s–1800s endecagon, 1700s 2000s– hendecagon.

Origin: A borrowing from French. Etymon: French hendécagone.

Etymology: < French hendécagone (also endécagone) plane figure having eleven sides and eleven angles (1613 or earlier), fort with eleven bastions (1619 or earlier) < post-classical Latin hendecagonus plane figure having eleven sides and eleven angles (1583 or earlier), fort with eleven bastions (1604 or earlier) < Hellenistic Greek ἑνδεκάγωνος having eleven angles < ancient Greek ἕνδεκα- hendeca- comb. form + -γωνος -gon comb. form.Compare Italian endecagono plane figure having eleven sides and eleven angles (1599 or earlier).

†1. Fortification. A fort with eleven bastions. Obsolete. rare.

ΘΚΠ

society > armed hostility > defence > defensive work(s) > fort or fortified town > [noun] > other types of fort

hendecagon1648

grand1670

etoile1727

vitrified fort1777

roundabout1795

ring fort1846

oppidum1847

sea-fort1879

motte-and-bailey1900

motte castle1912

mote-castle1919

murus gallicus1939

1648 B. Gerbier Interpreter Acad. Forrain Langs. ii. 9 All figures take their name, either from the number of angles or from the sid's, from thence comes the Greek names of Trigone, Tetragone, Pentagone, Exagone, Eptagone, Octogone, Enneagone, Decagone, Endecagone, Dodecagone Polygone, which is to say a Fortification of 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. angles, sid's or Bastions.

1704 J. Harris Lexicon Technicum I Hendecagon, in Fortification, 'tis taken for a Place defended by 11 Bastions.

2. Geometry. A plane geometrical figure with eleven angles and eleven straight sides. Also: an object of hendecagonal form or cross-section.

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

1649 B. Gerbier 1st Lect. Mil. Archit. 5 The figure takes its denomination either from the number of angles, or sides;..Enneagone at nine, Decagone at ten, Endecagone at eleven, Dodecagone at twelve.

1672 R. Pricke tr. J. Dubreuil Perspective Pract. 4 From the intersection C, unto the E, draw a line C D. This is the side of the Hendecagone [Fr. l'endecagone].

1752 J. L. Cowley Geom. made Easy ii. iv. 47 A Figure of five Sides is called a Pentagon;..; of eleven, a Endecagon; of twelve, a Dodecagon, &c.

1861 Philos. Trans. (Royal Soc.) 151 237 M. Mention has also given, but not in a developed form, the formulæ for the enneagon and the endecagon.

2010 @AnswersDotCom 2 July in twitter.com (O.E.D. Archive) The Susan B. Anthony [Canadian] $1 was originally a hendecagon, but vending machine manufacturers protested.

Derivatives

hendeˈcagonal adj. Geometry having the form of a hendecagon; eleven-sided; (also) of or relating to a hendecagon or hendecagons.

ΚΠ

1740 H. Meissner Stern und Kern der Algebræ 233 Eilff-Ekk, Undecangular, Hendecagonal.

1851 Ecclesiologist 12 401 To accommodate the vaulting of the aisles, the three sides that face them are thrown into two;—thus the capitals become hendecagonal.

2014 @SeanReeves 18 Mar. in twitter.com (O.E.D. Archive) 23725 is a #hendecagonal #pyramidal number.

This entry has been updated (OED Third Edition, December 2019; most recently modified version published online March 2022).

单词	hendecagon
释义	hendecagonn. Brit. /hɛnˈdɛkəɡ(ə)n/, /hɛnˈdɛkəɡɒn/, U.S. /hɛnˈdɛkəˌɡɑn/ Forms: 1600s hendecagone, 1600s–1700s endecagone, 1600s–1800s endecagon, 1700s 2000s– hendecagon. Origin: A borrowing from French. Etymon: French hendécagone. Etymology: < French hendécagone (also endécagone) plane figure having eleven sides and eleven angles (1613 or earlier), fort with eleven bastions (1619 or earlier) < post-classical Latin hendecagonus plane figure having eleven sides and eleven angles (1583 or earlier), fort with eleven bastions (1604 or earlier) < Hellenistic Greek ἑνδεκάγωνος having eleven angles < ancient Greek ἕνδεκα- hendeca- comb. form + -γωνος -gon comb. form.Compare Italian endecagono plane figure having eleven sides and eleven angles (1599 or earlier). †1. Fortification. A fort with eleven bastions. Obsolete. rare. ΘΚΠ society > armed hostility > defence > defensive work(s) > fort or fortified town > [noun] > other types of fort hendecagon1648 grand1670 etoile1727 vitrified fort1777 roundabout1795 ring fort1846 oppidum1847 sea-fort1879 motte-and-bailey1900 motte castle1912 mote-castle1919 murus gallicus1939 1648 B. Gerbier Interpreter Acad. Forrain Langs. ii. 9 All figures take their name, either from the number of angles or from the sid's, from thence comes the Greek names of Trigone, Tetragone, Pentagone, Exagone, Eptagone, Octogone, Enneagone, Decagone, Endecagone, Dodecagone Polygone, which is to say a Fortification of 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. angles, sid's or Bastions. 1704 J. Harris Lexicon Technicum I Hendecagon, in Fortification, 'tis taken for a Place defended by 11 Bastions. 2. Geometry. A plane geometrical figure with eleven angles and eleven straight sides. Also: an object of hendecagonal form or cross-section. 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 1649 B. Gerbier 1st Lect. Mil. Archit. 5 The figure takes its denomination either from the number of angles, or sides;..Enneagone at nine, Decagone at ten, Endecagone at eleven, Dodecagone at twelve. 1672 R. Pricke tr. J. Dubreuil Perspective Pract. 4 From the intersection C, unto the E, draw a line C D. This is the side of the Hendecagone [Fr. l'endecagone]. 1752 J. L. Cowley Geom. made Easy ii. iv. 47 A Figure of five Sides is called a Pentagon;..; of eleven, a Endecagon; of twelve, a Dodecagon, &c. 1861 Philos. Trans. (Royal Soc.) 151 237 M. Mention has also given, but not in a developed form, the formulæ for the enneagon and the endecagon. 2010 @AnswersDotCom 2 July in twitter.com (O.E.D. Archive) The Susan B. Anthony [Canadian] $1 was originally a hendecagon, but vending machine manufacturers protested. Derivatives hendeˈcagonal adj. Geometry having the form of a hendecagon; eleven-sided; (also) of or relating to a hendecagon or hendecagons. ΚΠ 1740 H. Meissner Stern und Kern der Algebræ 233 Eilff-Ekk, Undecangular, Hendecagonal. 1851 Ecclesiologist 12 401 To accommodate the vaulting of the aisles, the three sides that face them are thrown into two;—thus the capitals become hendecagonal. 2014 @SeanReeves 18 Mar. in twitter.com (O.E.D. Archive) 23725 is a #hendecagonal #pyramidal number. This entry has been updated (OED Third Edition, December 2019; most recently modified version published online March 2022). < n.1648
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