Substrate

Substrate may mean:
 * Substrate (building), Natural stone, masonry surface, ceramic and porcelain tiles
 * Substrate (aquarium), the material used in the bottom of an aquarium
 * Substrate (vivarium), the material used in the bottom of a vivarium or terrarium
 * Substrate (biochemistry), a molecule that is acted upon by an enzyme
 * Substrate (materials science), the material on which a process is conducted
 * Substrate (biology), the natural environment in which an organism lives, or the surface or medium on which an organism grows or is attached
 * Substrate (chemistry), the reactant which is consumed during a catalytic or enzymatic reaction
 * Substrate (marine biology), the earthy material that exists in the bottom of a marine habitat, like dirt, rocks, sand, or gravel
 * Substrate (printing), the base material that images will be printed onto
 * The stratum on which another geologic stratum lies

Electronics

 * Substrate (semiconductor), in electronic wafers and thin film electronics, the physical material upon which a semiconductor device, e.g. a photovoltaic cell or an integrated circuit, is applied


 * An entire printed circuit board (PCB), or more specifically, the electrically insulating portion of a PCB structure, such as fiberglass bound together with epoxy cement

Other uses
Substrate may also refer to:
 * Substratum, in linguistics, a language that influences but is supplanted by a second language
 * Neural substrate, in neuroscience, the set of brain structures that underlies a specific behavior or psychological state