Leviathan
Leviathan (le*vī"ȧ*than) , noun
[Hebrew livyāthān.]
1.
An aquatic animal, described in the book of Job, ch. xli., and mentioned in other passages of Scripture.
It is not certainly known what animal is intended, whether the crocodile, the whale, or some sort of serpent.
2.
The whale, or a great whale. — Milton