What is reef?

  • (verb): Lower and bring partially inboard.
    Example: "Reef the sailboat's mast"
    See also — Additional definitions below


In nautical terminology, a reef is a rock, sandbar, or other feature lying beneath the surface of the water (six fathoms or less beneath low water).

Read more about Reef.

Some articles on reef:

Blue Reef Aquarium Portsmouth
50.7801159°N 1.0928095°W / 50.7801159 -1.0928095 Blue Reef Aquarium Portsmouth is an aquarium situated on Clarence Esplanade, Southsea ... tunnel offers close encounters with reef fish ... In 2007 the aquarium opened the Blue Reef Beach Club ...
Blue Reef Aquarium - Hastings
50.8559909°N 0.5961998°E / 50.8559909 0.5961998 Blue Reef Aquarium Hastings is an aquarium in Hastings, England which opened on 21 March 2008, It was the fourth ... From the hidden world of UK waters, Blue Reef transports visitors to the spectacular ‘underwater gardens’ of the Mediterranean and the stunning beauty of tropical waters home to ... The centrepiece of the aquarium is the coral reef housed within a large ocean display with its underwater walkthrough tunnel ...
Pocklington Reef
... / -10.81222 155.73833 Pocklington Reef is a coral reef and a mostly submerged atoll in the far southeast of Papua New Guinea ... km from the closest island, Loa Boloba, which is a tiny coral islet within the fringing reef near Cape Deliverance, the south east point of Rossel Island (Yela) in the Louisiade Archipelago, and ... Pocklington Reef sits on top of Pocklington Ridge, which extends northeast from Rossel Island ...
Geologic Reef - Geologic Reef Structures
... Ancient reefs buried within stratigraphic sections are of considerable interest to geologists because they provide paleo-environmental information about the location in Earth's history ... In addition, reef structures within a sequence of sedimentary rocks provide a discontinuity which may serve as a trap or conduit for fossil fuels or mineralizing ... Corals, including some major extinct groups Rugosa and Tabulata, have been important reef builders through much of the Phanerozoic since the Ordovician Period ...
Aquarium Lighting - Marine - Reef
... The lighting used for reef aquariums is the highest intensity of all aquarium types ... Lamp colour plays an important role in reef aquarium lighting for both aesthetic preference and to optimally sustain the photosynthetic life within the aquarium ... Another light source in reef aquariums today is metal halide lighting ...

More definitions of "reef":

  • (verb): Reduce (a sail) by taking in a reef.
  • (noun): A rocky region in the southern Transvaal in northeastern South Africa; contains rich gold deposits and coal and manganese.
    Synonyms: Witwatersrand, Rand
  • (noun): A submerged ridge of rock or coral near the surface of the water.
  • (verb): Roll up (a portion of a sail) in order to reduce its area.

Famous quotes containing the word reef:

    As the bird trims her to the gale,
    I trim myself to the storm of time,
    I man the rudder, reef the sail,
    Obey the voice at eve obeyed in prime:
    “Lowly faithful, banish fear,
    Right onward drive unharmed;
    The port, well worth the cruise, is near,
    And every wave is charmed.”
    Ralph Waldo Emerson (1803–1882)

    Striking his former happiness against the reef of justice he has perished unwept for and unseen.
    Aeschylus (525–456 B.C.)