From metawiki
Materialism means molecules make matter

Reality is made up of matter. The Universe of matter is everything that is, nothing exists outside of it, be it a supernatural being or consciousness. The principles of logic and time can be said to exist outside the material universe, but that is only because these are inevitable principles of reality, not immaterial beings.

See Materialism on Wikipedia.

What is Materialism?

A guide to Materialism

MODERNS - Matter

Arcane Roots - Matter