noun
An underlying layer; a substratum.
The substance lining the bottom edge of an enclosure.
(biochemistry) A substance acted upon, as by an enzyme.
(biology) A surface on which an organism grows, or to which an organism or an item is attached.
(linguistics) A language that is replaced in a population by another language and that influences the language imposed on its speakers.
(plating) A metal which is plated with another metal which has different physical properties.
(construction) A surface to which a substance adheres.
verb
(obsolete, transitive) To strew or lay under.
adjective
Having very slight furrows.