Original: Owen is probably best remembered today for coining the word Dinosauria ( meaning '' Terrible Reptile '' or '' Fearfully Great Reptile '' ) and for his outspoken opposition to Charles Darwin 's theory of evolution by natural selection .
Simplified: Owen is probably best remembered today for coining the word Dinosauria ( meaning ` Terrible Reptile ' ) , and for his outspoken opposition to Charles Darwin 's theory of evolution by natural selection .