Jisho

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Noun
1. bottom of the ocean; seafloor; seabed​
Noun or verb acting prenominally
2. undersea; submarine​
Wikipedia definition
3. Seabed​The seabed (also known as the seafloor, sea floor, or ocean floor) is the bottom of the ocean.
Read “Seabed” on English Wikipedia
Read “海底” on Japanese Wikipedia
Read “Seabed” on DBpedia
Other forms
海底 【うなぞこ】

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