An older term for glycoprotein; a protein that has carbohydrate groups chemically bonded to it, serving important functions in cells.
From glyco- (Greek glykys 'sweet') + proteid (early variant of 'protein' from Greek proteios 'primary'). This is an archaic term replaced by the modern 'glycoprotein'.
Glycoproteid is a fossil word—it's what scientists called these molecules before standardized terminology took over, and finding it in old textbooks is like discovering how scientists talked before modern chemistry unified its language.
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