Definition of Heptagonal. Meaning of Heptagonal. Synonyms of Heptagonal
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Definition of Heptagonal
Heptagonal Heptagonal Hep*tag"o*nal, a. [Cf. F. heptagonal.]
Having seven angles or sides.
Heptagonal numbers (Arith.), the numbers of the series 1,
7, 18, 34, 55, etc., being figurate numbers formed by
adding successively the terms of the arithmetical series
1, 6, 11, 16, 21, etc.