Pronunciation: /əˈbɪsəl hɪl/
noun Abyssal hill - a raised area on the ocean floor that is part of the abyssal plain, typically formed by volcanic activity or tectonic processes.
A1 The abyssal hill is a small underwater mountain.
A2 Scientists study the formation of abyssal hills in the ocean.
B1 The abyssal hill is part of the ocean floor that is less steep than a seamount.
B2 The abyssal hill formed due to tectonic activity in the Earth's crust.
C1 The exploration of abyssal hills provides valuable insights into plate tectonics.
C2 The research vessel conducted a survey of the abyssal hills in the Pacific Ocean.
formal The abyssal hill is a prominent feature of the ocean floor, characterized by its steep slopes and rugged terrain.
informal Check out that abyssal hill over there, it looks like a big underwater mountain!
slang Dude, did you see the size of that abyssal hill? It's massive!
figurative Facing the challenges of starting a new business felt like climbing an abyssal hill, but we made it to the top.
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