Per″mi‐an (?), a. [From the ancient kingdom of Permia, where the Permian formation exists.] (Geol.) Belonging or relating to the period, and also to the formation, next following the Carboniferous, and regarded as closing the Carboniferous age and Paleozoic era. — n. The Permian period. See Chart of Geology.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.