endosymbiont

1 of 2

noun

en·​do·​sym·​bi·​ont ˌen-dō-ˈsim-ˌbī-ˌänt  -bē- 

variants also endosymbiote

-ˌōt 

: a symbiotic organism living within the body of its partner

endosymbiosis

2 of 2

noun

en·​do·​sym·​bi·​o·​sis ˌen-dō-ˌsim-bī-ˈō-səs  -bē- 

plural endosymbioses -ˌsēz 

: symbiosis in which a symbiotic organism lives within the body of its partner

endosymbiotic

-ˈät-ik 

adjective