a submerged ridge of rock or coral near the surface of the water a rocky region in the southern Transvaal in northeastern South Africa
contains rich gold deposits and coal and manganese 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 lower and bring partially inboard
"reef the sailboat's mast" roll up (a portion of a sail) in order to reduce its area reduce (a sail) by taking in a reef
Reef Relief
Focuses on rigorous science to educate the public and lobby policymakers to achieve Conservation, Protection, and Restoration of coral reef ecosystems. http://www.reefrelief.org