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			“c”
		
	
			c., circa (preposition)
					Approximately, when referring to a date; literally, it means ""around" a certain date": The group started the program circa 2013 in Germany. .
																	
							
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									Archeology, Archaeology									
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									coulomb, C
					An SI unit of electrical charge.
																	One coulomb is the quantity of electricity conveyed by a current of one ampere in one second.
							
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									Measurements and Mathematics Terms									
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									degree, °C
					Symbol for degrees Celsius; sometimes, called centigrade.
																	
							
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									Measurements and Mathematics Terms									
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