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单词 decagon
释义

decagonn.

/ˈdɛkəɡən/
Etymology: < medieval Latin decagōnum noun, decagōnus adjective, < Greek δεκάγωνον, δεκάγωνος, < Greek δέκα ten, and γωνία corner or angle, -γωνος angled. Used at first in Latin form. Compare French décagone, 1652 in Hatzfeld.
Geometry.
A plane figure having ten sides and ten angles. Also attributive.
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
1571 T. Digges in L. Digges's Geom. Pract.: Pantometria xxv. sig. H h iij v The superficies of an equiangle Decagonum.]
a1652 I. Jones in B. Allsopp & R. A. Sayce Inigo Jones on Palladio (1970) II. iv. 40 A Circell without and a decagono within.
1704 J. Harris Lexicon Technicum I. (at cited word) If they are all equal to one another 'tis then called a Regular Decagon, and it may be inscribed in a Circle.
1841 J. Murray Hand-bk. for Travellers on Continent (rev. ed.) 244/1 The circular portion, or rather the decagon, was not finished till 1227.
1881 Trans. Victoria Inst. XIV. 195 I discovered a perfect decagon terra cotta cylinder.
This entry has not yet been fully updated (first published 1894; most recently modified version published online June 2022).
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