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1st_ Third letter of the alphabet, called "ce" . 2nd_ 'c' in physics represents the speed of an electromagnetic wave, usually that of light. 3rd_ 'c' is the prefix "centi" for one hundredth of the unit. 4th_ 'C' is 100 in Roman numeration. 5th_ 'C' is the chemical symbol of carbon. 6th_ 'C' is the symbol of the culombio unit for electrical loads. 7th_ 'C' is short for cytokine in genetics. 8o_ 'C' is a programming language. 9th_ 'C' is the musical note C in the English notation 10o_ 'C' is the name of a vitamin . View ( C ) © © ( "copyright" ), C C ( "degree Celsius") .