('US') the 'food pyramid' [=a drawing or chart that is shaped like a pyramid and that shows the type of food you should eat for a healthy diet]
the ancient 'pyramids' of Egypt
a 'pyramid' of apples/oranges
(..) Good morning, Lara. And what a beautiful morning it is! Back to work, I'm afraid. It's adventure time. Egypt again? It's nothing but pyramids and sand. I know. Gets everywhere, in the cracks... Spanish galleon? Do you know what day it is, Hillary? Yes, of course... The th. (..)2001 Lara Croft: Tomb Raider