plural symbioses
-ˈoʊˌsiːz 
1
biology
: the relationship between two different kinds of living things that live together and depend on each other
—usually singular
The bacteria exist in a symbiosis with the plant's roots.
The bird lives in symbiosis with the hippopotamus.
2
formal
: a relationship between two people or groups that work with and depend on each other
—usually singular
There is a symbiosis between celebrities and the media.
Their professional association was one of symbiosis.
Cite this Entry
“Symbiosis.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/symbiosis. Accessed 19 Jun. 2026.
Copy Citation
