stra·tum

noun

/ˈstrɑːtəm/

/ˈstreɪtəm/

(plural strata

/ˈstrɑːtə/

/ˈstreɪtə/

)

(geology) a layer or set of layers of rock, earth, etc.层；岩层；地层
- a thick stratum of flint厚厚的燧石层
- limestone strata石灰岩地层
- Excavated coins can often be dated from other objects in the same stratum.出土的钱币通常可以根据同一地层中的其他物体来确定年代。
(formal) a class in a society阶层
- people from all social strata来自不同社会阶层的人
Topics People in societyc2
More Like This Easily-confused plural/singular forms
Easily-confused plural/singular forms
- bacteria/bacterium
- criteria/criterion
- data/datum
- media/medium
- phenomena/phenomenon
- strata/stratum

Word Originlate 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’.

单词	stratum
释义	stra·tum noun /ˈstrɑːtəm/ /ˈstreɪtəm/ (plural strata /ˈstrɑːtə/ /ˈstreɪtə/ ) (geology) a layer or set of layers of rock, earth, etc.层；岩层；地层 a thick stratum of flint厚厚的燧石层 limestone strata石灰岩地层 Excavated coins can often be dated from other objects in the same stratum.出土的钱币通常可以根据同一地层中的其他物体来确定年代。 (formal) a class in a society阶层 people from all social strata来自不同社会阶层的人 Topics People in societyc2 More Like This Easily-confused plural/singular formsEasily-confused plural/singular forms bacteria/bacterium criteria/criterion data/datum media/medium phenomena/phenomenon strata/stratum Word Originlate 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’.
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