It is the RADICAL SIGN , its definition is - the symbol used to indicate a nonnegitive square root.
The symbol used between two code numbers to indicate that a range is available is a
The apostrophe looks similar to, but is not the same as, the prime symbol ( ′ ), which is used to indicate measurement in feet.
Radical Sign
Parenthesis indicate that the enclosed members are a set. The brackets indicate that what enclosed Êinside of itÊis an option.
Danger!
A vertical open-faced diamond symbol is used to indicate a hazard such as a rock.
Danger
Danger
Danger
An orange diamond is the symbol on a regulatory marker that indicates hazards such as rocks or stumps.
An orange diamond is the symbol on a regulatory marker that indicates hazards such as rocks or stumps.
An orange diamond is the symbol on a regulatory marker that indicates hazards such as rocks or stumps.
A diamond on a regulatory buoy indicates danger or warning. If the diamond is crossed, it indicates any area that you should not enter. It may be a swimming area (which would be a "do not enter" area for boats), rapids, or some other danger. If the diamond is open, it's a warning buoy. It may indicate the presence of a rock, dam, wreck or other danger. Usually, the danger present is indicated under the diamond.
An octagon is a symbol on a regulatory marker that indicates a dam or stumps.
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A diamond is the symbol on a regulatory marker that is used to warn of rocks or other submerged hazards.