It is the old Latin abbreviation for "denarius", which was used for "penny" in the old British Commonwealth coinage system because the penny was effectively the direct descendant of the old Roman piece.
That means you have a coin worth 3 pence, where "pence" is the British plural of penny.
With the inscription "GEORGE VI KING EMPEROR" the coin is possibly an Indian or New Zealand coin however, a country name and denomination would be a big help.
Knowing the year would help, but if it has been circulated, it might get up to $2 NZD.
George Mitchell - New Zealand - was born in 1877.
George Mitchell - New Zealand - died in 1939.
George Rhodes - New Zealand - died in 1864.
George Rhodes - New Zealand - was born in 1816.
George Fisher - New Zealand - died in 1905.
George Fisher - New Zealand - was born in 1843.
George Stewart - New Zealand businessman - was born in 1885.
George Stewart - New Zealand businessman - died in 1955.
George Wood - New Zealand - was born on 1946-08-05.
George Clarke - New Zealand pioneer - died in 1913.