Bible Dictionaries
Ordovician
Webster's Dictionary
(1):
(n.) The Ordovician formation.
(2):
(a.) Of or pertaining to a division of the Silurian formation, corresponding in general to the Lower Silurian of most authors, exclusive of the Cambrian.
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Bibliography Information
Webster, Noah. Entry for 'Ordovician'. Noah Webster's American Dictionary. https://www.studylight.org/dictionaries/eng/web/o/ordovician.html. 1828.