substratum noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced American Dictionary at OxfordLearnersDictionaries.com

Definition of substratum noun from the Oxford Advanced American Dictionary

substratum

noun

NAmE//ˈsʌbˌstreɪt̮əm//

, NAmE//ˈsʌbˌstræt̮əm//

(pl. substrata

NAmE//ˈsʌbˌstreɪt̮ə//

, NAmE//ˈsʌbˌstræt̮ə//

) (technology)

a layer of something, especially rock or soil, that is below another layer a substratum of clay the substrata of society

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