Substrate

Substrate may mean:
Substrate (biology), the natural environment in which an organism lives, or the surface or medium on which an organism grows or is attached
Substrate (marine biology), the earthy material in the bottom of a marine habitat, like dirt, rocks, sand, or gravel
Substrate (aquarium), the material used in the bottom of an aquarium
The stratum that is covered by another geologic stratum
Substrate (biochemistry), a molecule an enzyme has an effect on
Substrate (chemistry), the catalytic material upon which chemical species react
Substrate may also mean:
Wafer (electronics), material upon which integrated circuits are fabricated
Printed circuit board (electronics), or the electrically insulating portion of a PCB structure
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
Substrate (printing), the base material to which images will be printed