dinosaur
noun
[ ˈdʌɪnəsɔː ]
• a fossil reptile of the Mesozoic era, in many species reaching an enormous size.
• a person or thing that is outdated or has become obsolete because of failure to adapt to changing circumstances.
Origin:
mid 19th century: from modern Latin dinosaurus, from Greek deinos ‘terrible’ + sauros ‘lizard’.