stratum
stratum
[ˈstrɑːtəm, ˈstreɪtəm]
(pl. strata -tə)
[ˈstrɑːtəm, ˈstreɪtəm]
(pl. strata -tə)
- a layer or a series of layers of rock in the ground
岩石层
a stratum of flint.
燧石层。
■a thin layer within any structure
层
thin strata of air.
薄薄的空气层。 - a level or class to which people are assigned according to their social status, education, or income
社会阶层
members of other social strata.
其他社会阶层的成员。
■(Statistics)a group into which members of a population are divided in stratified sampling
(统计)（人口的）分层抽样群体
- late 16th cent. (in the sense 'layer or coat of a substance'): modern Latin, from Latin, literally something spread or laid down', neuter past participle of sternere 'strew'
- In Latin, the word stratum is singular and its plural form is strata. In English, this distinction is maintained. It is therefore incorrect to use strata as a singular or to create the form stratas as the plurala series of overlying strata not a series of overlying stratasand a new stratum was uncovered not a new strata was uncovered
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