FROM STRONG’S HEBREW DICTIONARY (1890)

Strong’s Hebrew Dictionary (1890) — public domain, printed whole.

livyathan liv-yaw-thawn' — from 3867; a wreathed animal, i.e. a serpent (especially the crocodile or some other large sea- monster); figuratively, the constellation of the dragon; also as a symbol of Bab.:--leviathan, mourning.

see HEBREW for 03867