dCMP deaminase (, deoxycytidylate deaminase, deoxy-CMP-deaminase, deoxycytidylate aminohydrolase, deoxycytidine monophosphate deaminase, deoxycytidine-5'-phosphate deaminase, deoxycytidine-5'-monophosphate aminohydrolase) is an enzyme which converts deoxycytidylic acid to deoxyuridylic acid.