oceanic abyss


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Noun1.oceanic abyss - a long steep-sided depression in the ocean flooroceanic abyss - a long steep-sided depression in the ocean floor
natural depression, depression - a sunken or depressed geological formation
References in periodicals archive ?
This is where the continental shelf drops off into the oceanic abyss. The skipper checked his GPS coordinates and said that we were at a productive spot.
CHELSEA WOLFE, both appealingly dark and tonal, will hurl your mind into a cave filled with wolves and your heart into an oceanic abyss.
Conservationists say the combination of tropical islands, unspoiled coral reefs and adjacent oceanic abyss makes the area a biodiversity hotspot of global importance.