biolith

noun

bi·​o·​lith

ˈbīōˌlith

variants or less commonly biolite

-ˌlīt

plural -s

: a rock of organic origin : a rock produced directly by the activities of organisms

Word History

Etymology

International Scientific Vocabulary bi- entry 2 + -lith or -lite; originally formed as German biolith

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!