GLYCOPROTEIN

n. protein which includes a carbohydrate and a simple protein

Glycoproteins are proteins that contain oligosaccharide chains (glycans) covalently attached to their polypeptide backbones. Basically, glycoprotein is a biomolecule composed of a protein and a carbohydrate (an oligosaccharide). The carbohydrate is attached to the protein in a cotranslational or posttranslational modification.
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Glycoprotein /gly·co·pro·tein/ a conjugated protein covalently linked to one or more carbohydrate groups; technically those with less than 4 per [more]Glycoprotein - Community and Resources

Noun
1. a conjugated protein having a carbohydrate component
(hypernym) conjugated protein, compound protein
(hyponym) mucin

A protein that has sugar molecules attached to it.

gp100. A tumor-specific antigen used in the development of cancer vaccines.