κῆτος kētos

Meaning

a huge fish (as gaping for prey)

In the King James Version: whale

Derivation: probably from the base of G5490 (χάσμα);

Where it is used

• Matthew 12:40 For as Jonah was three days and three nights in the belly of the great fish, so the Son of Man will be three days and three nights in the heart of the earth.