De·vo·ni·an | \ di-ˈvō-nē-ən 
\
\Definition of Devonian
1 : of or relating to Devonshire, England
2 : of, relating to, or being the period of the Paleozoic era between the Silurian and the Mississippian or the corresponding system of rocks — see Geologic Time Table
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The first known use of Devonian was in 1612
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