be ‧ he ‧ moth /bəˈhiːmɒθ, bɪˈhiːmɒθ $ -mɑːθ/ BrE AmE noun [countable]
[ Date: 1500-1600 ; Origin: Behemoth very large animal (probably a hippopotamus) mentioned in the Bible (14-21 centuries) , from Latin , from Hebrew ]
formal something that is very large:
a trade behemoth that shipped abroad $800 billion worth of goods