stratum

1. n. A bed of earth or rock of one kind, formed by natural causes, and consisting usually of a series of layers, which form a rock as it lies between beds of other kinds. Also used figuratively. Source: opted

2. n. A bed or layer artificially made; a course. Source: opted

3. n. one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock) Source: wordnet

4. n. people having the same social, economic, or educational status Source: wordnet

5. n. an abstract place usually conceived as having depth Source: wordnet

6. n. a subpopulation divided into a stratified sampling Source: wordnet

7. 1. (Geol.) A bed of earth or rock of one kind, formed by natural causes, and consisting usually of a series of layers, which form a rock as it lies between beds of other kinds. Also used figuratively. 2. A bed or layer artificially made; a course. Source: webster

8. A bed of earth or rock of one kind, formed by natural causes,and consisting usually of a series of layers, which form a rock as itlies between beds of other kinds. Also used figuratively. Source: adambom

9. n:100 n. one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock) Source: ecdict

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