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Webster 1913 Edition

Noun.

[Gr. [GREEK] obtuse + [GREEK] angle: cf. F.

amblygone

(Geom.)

An obtuse-angled figure, esp. and obtuse-angled triangle.

[Obs.]

, or AM'BLYGON,

Noun.

[Gr. obtuse, and an angle.]

An obtuse angled triangle; a triangle with one angle of more than ninety degrees.

amblygon ‎(plural not attested)