'''''Apatosaurus''''' (Greek: ἀπατηλός ''apatelos'', and σαῦρος ''sauros''; "deceptive lizard") refers to three species of [[dinosaur]] originally discovered in the 1870's in the western United States. | '''''Apatosaurus''''' (Greek: ἀπατηλός ''apatelos'', and σαῦρος ''sauros''; "deceptive lizard") refers to three species of [[dinosaur]] originally discovered in the 1870's in the western United States. |