troph·o·bi·ot·ic \| ̷ ̷ ̷ ̷ˌ ̷ ̷|äd.ik\adjective Etymology:troph- + -biotic : of, relating to, or engaging in trophobiosis < trophobiotic insects > < the trophobiotic relation between some ants and the aphids from which they obtain sweet secretions >