Permian
[pur-mee-uh n] /ˈpɜr mi ən/
adjective
1.
Geology. noting or pertaining to a period of the Paleozoic Era occurring from about 280 to 230 million years ago and characterized by a profusion of amphibian species.
noun
2.
Geology. the Permian Period or System.
3.
.
/ˈpɜːmɪən/
adjective
1.
of, denoting, or formed in the last period of the Palaeozoic era, between the Carboniferous and Triassic periods, which lasted for 60 000 000 years
noun
2.
the Permian, the Permian period or rock system
1841, “pertaining to the uppermost strata of the Paleozoic era,” named by British geologist Sir Roderick Impey Murchison (1792-1871) for the region of Perm in northwestern Russia, where rocks from this epoch are found.
Permian
(pûr’mē-ən)
The seventh and last period of the Paleozoic Era, from about 286 to 245 million years ago. During the Permian Period the supercontinent Pangaea, comprising almost all of today’s landmasses, formed. Gymnosperms evolved, the first modern conifers appeared, and reptiles diversified. The Permian Period ended with the largest known mass extinction in the history of life. It wiped out nearly 90 percent of known marine life forms. See Chart at geologic time.
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[pur mil, per] /ˌpɜr ˈmɪl, pər/ adverb 1. per thousand. /pə ˈmɪl/ adverb 1. by the thousand or in each thousand
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[per-mil-ij] /pərˈmɪl ɪdʒ/ noun 1. a rate or proportion per thousand. Compare (def 1).
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[per-mis-uh-buh l] /pərˈmɪs ə bəl/ adjective 1. that can be ; allowable: a permissible amount of sentimentality under the circumstances; Such behavior is not permissible! /pəˈmɪsəbəl/ adjective 1. permitted; allowable adj. early 15c., from Old French permissible (15c.) and directly from Medieval Latin permissibilis, from permiss-, past participle stem of Latin permittere (see permit (v.)).