('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
(..) o/~ The Earth began to cool o/~ o/~ The autotrophs began to drool, Neanderthals developed tools o/~ o/~ We built the Wall o/~ o/~ We built the pyramid so/~ o/~ Math, Science, History, unraveling the mystery o/~ o/~ That all started with a big bang o/~ Her apartment's on the fourth floor (..)2007 TvShow: The Big Bang Theory Title: The Big Bran Hypothesis Season: 1 Episode 2