substratums

1. a surface on which an organism grows or is attachedExamples: "the gardener talked about the proper substrate for acid-loving plants"Synonyms: substrate, substratum

2. any stratum or layer lying underneath anotherSynonyms: substrate, substratum

3. an indigenous language that contributes features to the language of an invading people who impose their language on the indigenous populationExamples: "the Celtic languages of Britain are a substrate for English"Synonyms: substrate, substratum