English

exosymbiosis

From exo- + symbiosis.

Proto-Indo-European *h₁eǵʰs ‘out of’

Proto-Hellenic *eks

Ancient Greek ἐκ ‘Out of, from’

Ancient Greek ἔξω ‘outer’

English exo-

Ancient Greek συμβιόω ‘to live together’

Ancient Greek συμβίωσις ‘living together’

Today it means

noun A form of symbiosis in which one organism lives on the exterior of another

Language periods are conventional ranges, not dates for this word.

Etymograph / exosymbiosis