dodecagonn.
/dəʊˈdɛkəɡən/ Geometry.
A plane figure having twelve sides and twelve angles. regular dodecagon, one that has all its sides and all its angles equal.
ΘΚΠ
the world > space > shape > angularity > specific angular shape > [noun] > polygon > decagon or dodecagon
decagona1652
dodecagon1658
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
1658 E. Phillips New World Eng. Words Dodecagon (Greek), a Geometrical figure of 12 Angles.
a1696 E. Scarburgh Eng. Euclide (1705) 173 (note) From the bisection of an Hexagonal Arch, may be inscribed..a Duodecagon.
1861 G. W. Thornbury Life J. M. W. Turner I. 51 He draws trees when he should draw dodecagons.
Derivatives
dodeˈcagonal adj. of or pertaining to a dodecagon; twelve-sided.
ΘΚΠ
the world > relative properties > number > geometry > shape or figure > [adjective] > two-dimensional > with nine or more sides or angles
decagonal1571
thousand-sided1704
nonagon1754
dodecagonal1854
tridecilateral1882
1854 R. G. Mayne Expos. Lexicon Med. Sci. (1860) 281/2.
This entry has not yet been fully updated (first published 1897; most recently modified version published online June 2022).
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n.1658