STRATA
Meaning of STRATA in English
stra ‧ ta /ˈstrɑːtə $ ˈstreɪtə/ BrE AmE
1 . the plural of ↑ stratum
2 . a plural form sometimes used instead of ↑ stratum
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012