What's a holonym?

A holonym is a word that names the whole of which a given word is a part.

Shirt is a holonyn for sleeve; Hat is a holonym for brim. Car is a holonym for chassis.  Hummus is a holonym for itself.

Why? Because the word "Hummus" is Arabic. It translates to chickpea, or garbanzo in English.  In English, hummus is a (delicious) paste made from chickpeas and other ingredients, it is the whole and it is the parts. A lone holonym.