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orthodromy

noun or·thodro·my \ ˈȯ(r)thəˌdrōmē , ȯ(r)ˈthädrəmē \
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Definition of orthodromy

plural -es
: the act or art of great-circle sailing

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Origin and Etymology of orthodromy

French orthodromie, from orthodrom- (from Greek orth- + -dromos -drome) + -ie -y

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