biostrome

noun

bi·​o·​strome

ˈbīəˌstrōm

plural -s

: 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

Word History

Etymology

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

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