After all, there were quite a number of species in the Cluster that consumed physical substance.

But I would not call it a physical substance.

Heat is a form of energy and not a physical substance.

Having no physical substance, she could not carry the certificate.

His physical substance had been a tonic, but already the hunger was coming back.

Both the subject matter and the physical substance of French painting were reinvented in his best works.

If the nervous system is a physical substance, then all behavior must be directly caused by it.

"I am interested in seeing whether a dream figure can make incursion on physical substance."

In both, he writes, the physical substance of a thing is separate from its intellectual or spiritual meaning.

But perhaps it had also stopped some of the radiation, for the boy knew that physical substance could do this to a certain extent.