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