undecagonn.
/ʌnˈdɛkəɡ(ə)n/, /ʌnˈdɛkəɡɒn/, U.S. /ˌənˈdɛkəˌɡɑn/ Geometry.
A plane figure having eleven sides and angles.
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
1728 E. Chambers Cycl. Undecagon, is a regular Polygon of eleven Sides.
1798 C. Hutton Course Math. I. 267 A Pentagon is a polygon of five sides..an Undecagon, eleven.
1879 Cassell's Techn. Educator (new ed.) I. 251.
This entry has not yet been fully updated (first published 1921; most recently modified version published online March 2022).
<
n.1728- to listen on
- to listen one's an ear to
- to listen one's ears to
- to listen out
- to listen to reason
- to listen up
- to litter down
- to little avail
- to little effect
- to little purpose
- to live a double life
- to live and breathe
- to live and breathe something
- to live and learn
- to live and let live
- to live and look
- to live at a low sail
- to live at discretion
- to live at hack and manger
- to live at hake and manger
- to live at stave's end
- to live at stint
- to live away
- to live beyond one's means
- to live but and ben with