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atman
atmo-
atmosphere
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atole
atoll
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atoll

a·toll [ á tòl ] (plural a·tolls)


noun 
Definition:
 
coral island surrounding lagoon: a ring-shaped coral reef and small island that encloses a lagoon and is surrounded by open sea ( often used in place names )
Bikini Atoll

[Early 17th century. < Maldivian atoḷu]
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