stratum /ˈstreɪtəm/ Brit /ˈstrɑːtəm/ noun plural strata /ˈstreɪtə/ Brit /ˈstrɑːtə/ /ˈstreɪtəm/ Brit /ˈstrɑːtəm/
noun
plural strata /ˈstreɪtə/ Brit /ˈstrɑːtə/ Learner's definition of STRATUM
[count]
1
: one of usually many layers of a substance (such as rock)岩层;地层 -
a rock stratum岩层
-
a stratum of earth地层
2
: a level of society made up of people of the same rank or position社会阶层