noun
a small, low island composed largely of coral or sand
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The cay we visited during our field trip was teeming with diverse marine life.
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Let's head over to that little cay for some snorkeling and sunbathing.
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That cay is the perfect spot for a chill day of swimming and picnicking.
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The isolated cay represented a sense of freedom and escape from the hustle and bustle of city life.