It is a molecule which is made up of carbohydrate and protein. http://www.medterms.com/script/main/art.asp?articlekey=16842

Glycoproteins These consist of several proteins covalently bound to carbohydrates. The carbohydrate content varies from 1-90% by weight. When carbohydrate conc is more than 4% it is described as mucoprotein. REF:BIOCHEMISTRY-Dr.U.Satyanarayana and Dr.U.Chakrapani.3rd EDITION .Page-25

The Glycoproteins are molecules which are made of Carbohydrates and proteins. The endoplasmic recticulum and the Golgi Apparatus are the two main organelles involved in the process which make the carbahydrates and proteins bond together. Ref: http://www.answers.com/topic/glycoprotein http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/G/Glycoproteins.html