Galilean

adjective
Gal·​i·​le·​an | \ˌga-lə-ˈlē-ən, -ˈlā- \

Definition of Galilean 

: of, relating to, or discovered by Galileo Galilei Galilean satellites

First Known Use of Galilean

circa 1751, in the meaning defined above

History and Etymology for Galilean

galileo + -an entry 2

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The first known use of Galilean was circa 1751

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