Stratum

classe

(class of society composed of people with similar social, cultural, or economic status)

couche

(one of several parallel horizontal layers of material arranged one on top of another)

couche

(any of the regions of the atmosphere)

couche

(layer of tissue)

couche

(class of society composed of people with similar social, cultural, or economic status)

strate

(layer of sedimentary rock having approximately the same composition throughout)

stratum

(layer of tissue)