- a ring-shaped coral reef or a string of closely spaced small coral islands, enclosing or nearly enclosing a shallow lagoon.
Origin of atoll
Examples from the Web for atoll
Plus, Kate and William could hardly have picked a worse time for their luxury vacation to a resort in Noonu atoll.William and Kate Leave Baby George Behind As They Jet Off On Maldive Holiday
March 7, 2014
Local paper HaveeryOnline reports that the royal couple are known to be spending their vacation at a resort in Noonu atoll.ANOTHER Vacay for Kate and William
March 6, 2014
First, you would have to decide that the atoll was a viable option.Amelia Earhart Breakthrough? Don’t Bet On It
June 3, 2012
Once more he raised the glass to his eye and gazed toward the inlet of the atoll.
Sanders knew of it, and said they passed it still closer on their way to the atoll.
And search they did, atoll after atoll, until at the end of an hour they were rewarded.David and the Phoenix
For a trifling sum I could have chartered a schooner and sought the atoll.
The atoll is known, but uncharted, because it is far outside the routes.
- a circular coral reef or string of coral islands surrounding a lagoon
Word Origin and History for atoll
1620s, atollon, from Malayam atolu "reef," probably from adal "closing, uniting." Popularized in present form by Darwin's writings.
- A coral island or series of coral islands forming a ring that nearly or entirely encloses a shallow lagoon. Atolls are surrounded by deep ocean water and range in diameter from about 1 km (0.62 mi) to over 100 km (62 mi). They are especially common in the western and central Pacific Ocean and are believed to form along the fringes of underwater volcanoes. Compare barrier reef fringing reef.
A coral island that surrounds a lagoon. (See coral reef.)