Pentagon
Chamber's Etymological of the English Language · 1895 · p. 380
pen'ta-gon, n. geom a plane figure having five angles and five sides.—adj. Pen- — tag’'onal. [Gr. Pentagdnon pentc, five, gdnia, angle.]
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Chamber's Twientieth Century Dictionary (1908)
The Optical Dictionary (1904)
An Illustrated Dictionary of Words Used In Art and Archealogy. (1883)
A Military Dictionary and Gazetteer (1881)
Zell's Condensed Dictionary (1879)
Dictionary of Science, Literature and Art (1854)
Dictionary of Science, Literature and Art (1842)
A Military Dictionary (1810)
Pentagon -um
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