Definition of Mesozoic in English:

Mesozoic

Syllabification: Mes·o·zo·ic
Pronunciation: /ˈmezəˈzōik, ˌmē-
 
/

adjective

Geology
1Of, relating to, or denoting the era between the Paleozoic and Cenozoic eras, comprising the Triassic, Jurassic, and Cretaceous periods.
More example sentences
  • In later Palaeozoic, Mesozoic, and Cenozoic sequences they can be extremely abundant.
  • We believe that many Mesozoic and Cenozoic obducted ophiolite belts of SE Asia are fragments of fore-arc or back-arc lithosphere.
  • These are accompanied by much smaller sets of petrographic thin sections from Mesozoic and Cenozoic carbonate strata.
1.1 (as noun the Mesozoic) The Mesozoic era or the system of rocks deposited during it.

The Mesozoic lasted from about 245 million to 65 million years ago. Large reptiles were dominant on land and sea throughout this time; vegetation had become abundant, and the first mammals, birds, and flowering plants appeared

Origin

mid 19th century: from meso- 'intermediate' + Greek zōion 'animal' (referring to the appearance of the first mammals) + -ic.

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