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biostrome

noun
bi·​o·​strome | \ ˈbīəˌstrōm\
plural -s

Definition of biostrome

: a distinctly bedded or broadly lenticular body of rock composed mainly of the remains of sedentary organisms (such as shell beds, crinoid beds, or coral beds) — compare bioherm

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History and Etymology for biostrome

bi- entry 2 + Late Latin stroma coverlet, from Greek strōma bed, mattress

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