Definitions
1.nounWhat an enzyme acts upon.
2.nounA surface on which an organism grows, or to which an organism or an item is attached."The rock surface of a rockpool is the substrate for a sessile organism such as a limpet."
3.nounAn underlying layer; a substratum.
4.nounA language that is replaced in a population by another language and that influences the language imposed on its speakers.
5.noun(plating) A metal which is plated with another metal which has different physical properties.
6.nounA surface to which a substance adheres.
7.nounThe substance lining the bottom edge of an enclosure."Stream substrate affects fish longevity."