They also can become weak, expel material from the stomach, and suffer pain in the head or muscles.

VOA: special.2010.04.20

Fuller was head of a company that made a light-weight building material.

VOA: special.2010.05.30

Another kind of creative problem, though, is when you don't have the right kind of raw material kicking around in your head.

WSJ: Jonah Lehrer on How to Be Creative

The profuse material culture of handcrafted objects includes floats, costumes, head ornaments and animal masks.

UNESCO: Intangible Cultural Heritage

Deacon is arguing that scientists can accept head on, the notion that conscious thought is not material, and yet in principle can be explained in natural terms by a sort of architecture of constraints.

FORBES: Book Of The Year: The Return Of Teleology