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Definition of Enneagon

1. n. A polygon or plane figure with nine sides and nine angles; a nonagon.

Definition of Enneagon

1. a nonagon [n -S] - See also: nonagon

Medical Definition of Enneagon

1. A polygon or plane figure with nine sides and nine angles; a nonagon. Origin: Gr. Nine + corner, angle: cf. Enneagone. Source: Websters Dictionary (01 Mar 1998)

Enneagon Pictures

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Lexicographical Neighbors of Enneagon

enmities enmity enmity enmossed enmove enmoved enmoves enmoving ennage ennages

ennation ennead enneadic enneads enneagon (current term) enneagon (current term) enneagonal enneagons enneagynous enneandria

enneandrous enneapetalous enneaspermous enneatical ennervation enniatin B synthetase ennoble ennoble ennobled ennoblement

Literary usage of Enneagon

Below you will find example usage of this term as found in modern and/or classical literature:

1. The Harmony of the World by Johannes Kepler, A. M. (Alistair Matheson) Duncan, Eric J. Aiton, Judith Veronica Field (1997)
"Concerning the enneagon, whose number of sides, 9, is the square of the first odd Prime, namely three, there has been a contest among Geometers, ..."

2. Geometry, Plane, Solid, and Spherical, in Six Books: To which is Added, in by Pierce Morton (1830)
"Still there are many regular figures, as the heptagon, enneagon, ... For a second example, let us take the enneagon, or, as it is sometimes called, ..."

3. A History of Greek Mathematics by Thomas Little Heath (1921)
"If AB be the srde (a) of an enneagon or ... For the enneagon AC- = QAB'2, whence BC2 = 8AB* or approximately ^^/-AB2, and BC = \7-a; therefore (area of ..."

4. The Collected Mathematical Papers of Arthur Cayley by Arthur Cayley (1891)
"The foregoing values show that 23 and 1234 (which belong to the hexagon and the enneagon) divide by c (which belongs to the triangle), and that 234 (which ..."

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