Bible Dictionaries
Mesozoic

Webster's Dictionary

(1):

(a.) Belonging, or relating, to the secondary or reptilian age, or the era between the Paleozoic and Cenozoic. See Chart of Geology.

(2):

(n.) The Mesozoic age or formation.

Bibliography Information
Webster, Noah. Entry for 'Mesozoic'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​m/mesozoic.html. 1828.