Substrate

Substrate may refer to:

Physical layers

 * Substrate (biology), the natural environment in which an organism lives, or the surface or medium on which an organism grows or is attached
 * Substrate (aquatic environment), the earthy material that exists in the bottom of an aquatic habitat, like dirt, rocks, sand, or gravel
 * Substrate (vivarium), the material used in the bottom of a vivarium or terrarium
 * Substrate (aquarium), the material used in the bottom of an aquarium
 * Substrate (building), natural stone, masonry surface, ceramic and porcelain tiles
 * Substrate (chemistry), the reactant which is consumed during a catalytic or enzymatic reaction
 * Substrate (materials science), the material on which a process is conducted
 * Substrate (printing), the base material that images will be printed onto
 * Printed circuit board (PCB), or more specifically, the electrically insulating portion of a PCB structure, such as fiberglass bound together with epoxy cement
 * Substrate (geology), a stratum on which another geologic stratum lies
 * Wafer (electronics), sometimes called a substrate for deposition or growth processes

Other uses

 * Substratum (linguistics), 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