Covalent attachment of a saccharide to a protein, lipid, polynucleotide, saccharide, or other organic compound, generally catalysed by enzymes glycosyltransferases.
Source: PAC, 2018, 90, 1121. 'Terminology of bioanalytical methods (IUPAC Recommendations 2018)' on page 1173 (https://doi.org/10.1515/pac-2016-1120)