a curved chain of islands, as the Aleutians or Antilles, usually convex toward the ocean and enclosing a deep-sea basin.
Long Island Iced TeaRead more in this article about some frequently asked questions and fun facts related to our definitions.
Why is Easter Island named “Easter”?The instantly recognizable statues on Easter Island (887 of them), called moai, have perplexed and fascinated explorers, experts and average folks since the Dutch explorer Jacob Roggeveen came across it in 1722. And Mr. Roggeveen is the reason it’s called Easter Island. He and his crew dropped anchor on Easter Sunday. The current inhabitants of Isla de Pascua (Spanish for “Easter Island”) call it Rapa Nui, a …
Origin of island arc
First recorded in 1905–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
an arc-shaped chain of islands, such as the Aleutian Islands or the Japanese Islands, usually lying at the edge of a Benioff zone, indicating volcanic activity where the oceanic lithosphere is descending into the earth's interior
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
A usually curved chain of volcanic islands bounded on the convex side by a deep oceanic trench. Island arcs form in the overriding tectonic plates of subduction zones as the result of rising melt from the downgoing plate. The arcs are curved because of the curvature of the Earth. The Aleutian Islands, in Alaska, are an island arc. An island arc is a kind of volcanic arc.
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