[ ˌmɛsə(ʊ)'zəʊɪk , ˌmɛz- , ˌmi:s- , ˌmi:z- ]
■ adjective Geology relating to or denoting the era between the Palaeozoic and Cenozoic eras (comprising the Triassic, Jurassic, and Cretaceous periods, about 245 to 65 million years ago).
Origin
C19: from meso- + Gk zōion 'animal' + -ic .