ocean floor

Từ điển WordNet v3.1 - WordNet Dictionary

noun

the bottom of a sea or ocean (Freq. 1)
• Syn:
sea floor, ocean bottom, seabed, sea bottom, Davy Jones's locker, Davy Jones
• Hypernyms:
bed, bottom
• Hyponyms:
abyssal zone, continental shelf, continental slope, bathyal zone, bathyal district,
neritic zone, twilight zone