WordWeb Online

1. The substance that is acted upon by an enzyme or ferment
    
2. A surface on which an organism grows or is attached
   "the gardener talked about the proper substrate for acid-loving plants";
   - substratum
    
3. Any stratum or layer lying underneath another
   - substratum
    
4. An indigenous language that contributes features to the language of an invading people who impose their language on the indigenous population
   "the Celtic languages of Britain are a substrate for English";
   - substratum

Derived forms: substrates

Type of: indigenous language, stratum, substance, surface

Encyclopedia: Substrate