Mesozoic

adjective

Me·​so·​zo·​ic ˌme-zə-ˈzō-ik 

ˌmē-,

-sə-

: of, relating to, or being an era of geologic history comprising the interval between the Permian and the Tertiary or the corresponding system of rocks that was marked by the presence of dinosaurs, marine and flying reptiles, ammonites, ferns, and gymnosperms and the appearance of angiosperms, mammals, and birds see Geologic Time Table

Mesozoic noun

Word History

First Known Use

1840, in the meaning defined above

Kids Definition

Mesozoic

adjective

Me·​so·​zo·​ic ˌmez-ə-ˈzō-ik 

ˌmēz-,

ˌmēs-,

ˌmes-

: of, relating to, or being an era of geological history between the Paleozoic and Cenozoic eras or the corresponding system of rocks see geologic time

Mesozoic noun