symbiosis symbionticism • symbiot · · · Info · Definitions · Synonyms · Characters · · symbiosis · · Text Latin · · Script 9 · · Length Definitions · · · (noun) the relation between two different species of organisms that are interdependent; each gains benefits from the other. Synonyms: mutualism. · · Noun Definition 1 Synonyms · · · mutualism · · Synonym 1 Characters · · b latin small letter b U+0062 i latin small letter i U+0069 m latin small letter m U+006D o latin small letter o U+006F s latin small letter s U+0073 y latin small letter y U+0079