Final answer:
Any glycolipid having one or more sialic acid residues is called a ganglioside.
Step-by-step explanation:
Glycolipids are lipids that contain a carbohydrate attached to the sphingol at the primary alcohol. Any glycolipid that has one or more sialic acid residues is called a ganglioside. Gangliosides are complex sphingolipids made up of several sugar units, including glucose, galactose, galactosamine, and N-acetyl-neuramic acid or sialic acid.