amblygon

From Ancient Greek ἀμβλύς (amblús) + -gon.

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amblygon (plural not attested)

1. (geometry, obsolete, rare) An obtuse-angled shape, especially an obtuse triangle.

• amblygonal

• “amblygon”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.