Ectosymbiosis is a symbiotic relationship where the symbiont lives on the surface of the host, including its digestive tract or exocrine gland ducts. [4][24] Examples include ectoparasites such as lice, and … The meaning of SYMBIOTIC is relating to or marked by symbiosis. How to use symbiotic in a sentence. SYMBIOTIC definition: 1. involving two types of animal or plant in which each provides the conditions necessary for the…. Learn more. SYMBIOTIC definition: living in symbiosis, or having an interdependent relationship. See examples of symbiotic used in a sentence. Definition of symbiotic adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. A symbiotic relationship is one in which organisms, people, or things exist together in a way.... Click for English pronunciations, examples sentences, video. · Symbiotic relationships play a critical role in the development of ecological communities, the promotion of biodiversity, and the overall health and harmony in ecosystems. · Adjective symbiotic (not comparable) (ecology) Of, or relating to symbiosis; living together. Define symbiotic. symbiotic synonyms, symbiotic pronunciation, symbiotic translation, English dictionary definition of symbiotic. n. pl. sym·bi·o·ses 1. Biology A close, prolonged association between two or … · Any association between two species populations that live together is symbiotic, whether the species benefit, harm, or have no effect on one another.