לִוְיָתָן
From LSJ
ξυνῆλθεν ἀτταγᾶς τε καὶ νουμήνιος → birds of a feather flock together, the francolin and the new-moon bird get together
English (Strong)
from לָוָה; 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.