I. də̇ˈvōnēən, dēˈ-, -nyən adjective
Usage: usually capitalized
Etymology: Devon, county in England + English -ian
1. : of or relating to Devonshire or Devon in England
2. : of or relating to the period of the Paleozoic that follows the Silurian and is next below the Mississippian or the system of rocks formed during this period which are commonly separable into marine and nonmarine facies and are characterized by abundant preservation of fossils including ferns, lycopods, horsetails, and a few gymnosperms as plants and abundant lower fishes and some air-breathing invertebrates — see geologic time table
II. noun
( -s )
Usage: usually capitalized
1. : a native or inhabitant of Devonshire
2. : the Devonian period or system of rocks