The term "dinosaur" was coined in 1842 by Sir Richard Owen. The origin of the name is from Greek words: deinos, which may be translated as "terrible", "powerful", or "fearfully great", and sauros, which means "lizard" or "reptile". So, the meaning of "Dinosaur" is "Terrible Lizard". Owen picked this name to suggest the size and majesty of the creatures, not just their terror.