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mass of ice that has become detached, or calved, from the edge of an ice sheet or glacier and is floating on the ocean. Because ice is slightly less dense than water about one ninth of the total mass of a berg projects above the water. Greenland and other N Atlantic icebergs are usually peaked and irregular in shape; Antarctic icebergs are tabular, with flat tops and steep sides, and are sometimes extremely large when calved from an ice shelf. Icebergs differ from other ocean ices: sea ice is formed directly from the freezing of ocean water; pack ice is tightly packed fragments of sea ice; ice floes are small, floating ice fragments that separate from pack ice; and fast ice is ice attached to a shore.

Greenland is the source of most of the icebergs in the N Atlantic, where the iceberg season lasts roughly from February to October. As a consequence of the loss of the Titanic through collision with an iceberg in 1912, a patrol of N Atlantic shipping channels was initiated in 1914 by the international agreement of 16 nations. Patrols use planes and surface vessels equipped with radar, loran, and underwater sound equipment. A constant census of bergs is maintained, and the location of an iceberg is reported to any ship in its vicinity.

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A large mass of glacial ice broken off and drifted from parent glaciers or ice shelves along polar seas; it is distinguished from polar pack ice, which is sea ice, and from frozen seawater, whose rafted or hummocked fragments may resemble small icebergs.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


a large mass of ice floating in the sea, esp a mass that has broken off a polar glacier
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Eisberg is made in the same way as regular wine, with the alcohol gently removed at the end through vacuum distillation.
Dani Rowe (WaowDeals Pro Cycling) remains the top Brit in third overall and wears the Adnams Best British Rider jersey, four seconds behind team-mate Vos, while Rivera continues to hold both the Eisberg Sprints and Breast Cancer Care Points jerseys.
I well remember several happy Sundays in Pen Llyn having crab salad in Penbrynbach, beyond Aberdaron, having the obligatory bottle of Eisberg. Yet the sympathetic landlord Roger would accidentally refill the bottle with Muscadet that, of course went beautifully with crab - as it does to this day.
The EISBERG ROSE ALCOHOL-FREE WINE (0.05% vol, 33 cal per 125ml, PS2.75, Morrisons and Tesco) has a nose of red fruits, sort of, and dives straight into the stewing pot.
Trust chief executive Andrew Langford said: "The British Liver Trust's Love Your Liver 2013 campaign, supported by Eisberg Alcohol-Free Wine, tested 500 people and found that 21% of those scanned were showing some signs of liver disease.
The charity made its plea as it launched its second Love Your Liver awareness campaign, to be led by a nationwide roadshow of 'pop-up' liver health clinics, sponsored by Eisberg alcohol-free wine.
Except for the quantum numbers, Eisberg and Resnick [6, Example 8-3] find a similar result for the energy due to spin-orbit interaction.
Neil Eisberg, spokesman for the Chemicals Industry Association, of which Ineos is a member, said any crises faced by major players were likely to ripple through the sector.
The most expensive was Tesco's Eisberg Alcohol Free Chardonnay at pounds 2.99.