This section talks about "carnosaurs", but first a word about its meanings. In old sources, this term included all large theropods, from Tyrannosaurus to Allosaurus, from Ceratosaurus to Megalosaurus, to Baryonyx, Spinosaurus, and sometimes even Dilophosaurus. Science Marches On however, and now “carnosaurs” has a much narrower meaning, indicating only the natural lineage including Allosaurus and its closest relatives, which make together the most advanced and bird-like giant theropods after the tyrannosaurs. But this change has happened only at the beginning of the 1990s (ceratosaurs and Dilophosaurus were removed earlier). That’s why pre-Jurassic Park dino-fans still have the habit to call “carnosaurs” all the big meat-eaters in the dino-world - and let’s admit it, “carnosaur” is a very