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Reef
[NOUN]2
one of several strips across a sail that can be taken in or rolled up to lessen the area of the sail that is exposed to the wind
3
a rocky region in the southern Transvaal in northeastern South Africa; contains rich gold deposits and coal and manganese
Examples
1. We saw a group of fish swimming together near the coral reef.
2. The sea is home to a variety of marine life, such as fish, dolphins, and coral reefs.
3. Reefs are an increasingly important resource for breakthrough medical treatments, too.
4. No reefs can survive both changes.
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