Answer: substrate

AnswerCrossword Clue
SUBSTRATEUnderlying layer
substrateThe substance on which an enzyme acts
substrateThe surface or material on or from which an organism lives, grows, or obtains its nourishment
substrateA material that provides the surface on which something is deposited or inscribed, for example the silicon wafer used to manufacture integrated circuits
substratesomething that is spread or laid under something else.
substrateA substance or layer that underlies something, or on which some process occurs, in particular
substratea substratum also SUBSTRATUM