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biostrome

American  
[bahy-uh-strohm] / ˈbaɪ əˌstroʊm /

noun

Geology.

  1. a bedded, blanketlike sedimentary deposit of organic origin built by marine organisms and including shell beds, flat reefs, and corals.

biostrome British  
/ ˈbaɪəˌstrəʊm /

noun

  1. a rock layer consisting of a deposit of organic material, such as fossils

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • biostromal adjective

Etymology

Origin of biostrome

1930–35; bio- + Greek strôma layer, bed; stroma

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.