In 1877, German botanist Albert Frank coined the term "mycorrhiza" to describe the mutualistic interconnections between trees and fungi. He also noticed the mutualistic relationship between algae and fungi in lichens. Later, in 1879, this idea was further refined as "symbiosis" by the mycologist Heinrich Anton de Barry, who defined it as "the living together of unlike organisms". A related term is "symbiogenesis", which means "the evolution, over time, of new behaviours, physiologies, organs or organisms that are directly attributable to symbiosis." --- Source: Albrecht, Glenn. _Earth Emotions: New Words for a New World_. Ithaca: Cornell University Press, 2019.