substrate

Definitions of substrate in various dictionaries:

noun - the substance that is acted upon by an enzyme or ferment

noun - a surface on which an organism grows or is attached

noun - any stratum or layer lying underneath another

noun - an indigenous language that contributes features to the language of an invading people who impose their language on the indigenous population

The material or substance on which an enzyme acts.

A surface on which an organism grows or is attached.

An underlying layer; a substratum.