Definition from Wiktionary, the free dictionary
phytoherm (plural phytoherms)
- (geology, biology) A calcareous 'freshwater reef', generally built up from autochthonous petrification of bryophytes, funghi, algae and cyanobacteria.
- Pedley, H.M. 1990. Classification and environmental models of cool freshwater tufas. Sedimentary Geology 68, pp. 143-154.