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Stratum Definition & Meaning - Merriam-Webster
STRATUM Definition & Meaning | Dictionary.com
STRATUM | definition in the Cambridge English Dictionary
Stratum - Definition, Meaning & Synonyms - Vocabulary.com
STRATUM | English meaning - Cambridge Dictionary
stratum noun - Definition, pictures, pronunciation and usage …
STRATUM definition and meaning | Collins English Dictionary
stratum, n. meanings, etymology and more - Oxford English …
Stratum Definition & Meaning | Britannica Dictionary
stratum - WordReference.com Dictionary of English