seismosaurus
/ˈsʌɪzmə(ʊ)sɔːrəs
/noun
A huge late Jurassic dinosaur known from only a few bones, probably the longest ever animal with a length of up to 35-45 m, and one of the heaviest at up to 100 metric tons.
- Genus Seismosaurus, infraorder Sauropoda, order Saurischia.
Origin
Modern Latin, from seismo- 'of an earthquake' + Greek sauros 'lizard'.