comes from the Greek word abyssos (Ancient Greek: ἄβῠσσος, romanized: ábussos), meaning "bottomless, unfathomable, boundless". It is used as both an...

pelagic zone of the ocean. The word abyss comes from the Greek word ἄβυσσος (ábussos), meaning "bottomless". At depths of 4,000–6,000 m (13,000–20,000 ft),...