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symphile

noun
sym·​phile | \ˈsimˌfīl\
plural -s

Definition of symphile 

: an insect (such as any of various beetles) living as a guest in the nest of a social insect (such as an ant or termite) by which it is fed and guarded for its secretions which are used as food

— called also myrmecoxene, true guest

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History and Etymology for symphile

probably back-formation from symphily

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