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Noun: leviathan  li'vI-u-thun
  1. The largest or most massive thing of its kind
    "it was a leviathan among redwoods"; "they were assigned the leviathan of textbooks"
  2. Monstrous sea creature symbolizing evil in the Old Testament

Derived forms: leviathans

Type of: freak, lusus naturae, monster, monstrosity, mythical creature, mythical monster

Encyclopedia: Leviathan, David