Etymology
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Anglo- 
word-forming element meaning "of or pertaining to England or the English (including the English inhabitants of North America and other places); of England and," from Medieval Latin Anglo-, combining form of Angli "the English" (see Angle).
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-gon 

word-forming element meaning "angle, corner," from Greek gōnia "corner, angle," from PIE root *genu- (1) "knee; angle."

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