Mesozoa :: Mesozoa (n. pl.) A group of very lowly organized, wormlike parasites, including the Dicyemata. They are found in cephalopods. See Dicyemata..
Mesozoic :: Mesozoic (a.) Belonging, or relating, to the secondary or reptilian age, or the era between the Paleozoic and Cenozoic. See Chart of Geology..
Mesozoic :: Mesozoic (n.) The Mesozoic age or formation.