A cytosine ribonucleotide (where the nitrogenous base cytosine is linked to the sugar ribose and a phosphate group) that helps make glycoproteins (a protein linked to a sugar or polysaccharide). Also called cytidine monophosphate or CMP.
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.