an abstract place usually conceived as having depth | an indigenous language that contributes features to the language of an invading people who impose their language on the indigenous population |
a subpopulation divided into a stratified sampling | any stratum or layer lying underneath another |
people having the same social, economic, or educational status | a surface on which an organism grows or is attached |
one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock) | the substance that is acted upon by an enzyme or ferment |