UnscrambleTheWord.costratum
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Is stratum a Scrabble word?
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- Scrabble US/Canada (OTCWL) Yes
- Scrabble UK (SOWPODS) Yes
- Wordle No
- Words With Friends Yes
Scrabble US/Canada (OTCWL) 
Wordle 
Words With Friends What is the meaning of stratum?
Definition
noun (English)
1. (geology) A layer of sedimentary rock having approximately the same composition throughout.Examples: "An illuminating article in a recent issue of the Eastern Region's Civil Engineering News points out that where coal is worked over a reasonably large area, it is not only the whole of the strata above the workings, but also an area beyond which is liable to subside at varying rates after the coal has been removed."Synonyms: bed, layer
2. (biology) A layer of tissue.
3. (ecology) A layer of vegetation, usually of similar height.
4. (computing) The level of accuracy of a computer's clock, relative to others on the network.Examples: "Computers that synchronize themselves to the stratum 1 time servers are known as stratum 2 time servers if they allow others to synchronize to them, and so on."
5. (linguistics) A historical layer of a language.Synonyms: strate
Definition source: Wiktionary