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A rock formed from the remains of or physiologic action of organisms.

bi′o·lith′ic adj.
References in periodicals archive ?
Contract notice: Supply and installation of the biofilter biolith n7 of udep siloe has cran-gevrier
The investigators place the paintings between 4200 and 1680 years ago, but they suggest caution because of possible contamination from carbonate bioliths in the cliff, which could make samples appear older than their true age (Chen & Zhu 1988).
The fighting between the nations continued for years until one day, ancient tools created by man, the Bioliths, began a concentrated attack on the living, throwing the nations of Fire, Wood, Earth, and Water into further chaos.