Symbiotic \Sym`bi*ot"ic\ ([i^]m`b[i^]*[o^]t"[i^]k), a. [Gr. symbiwtiko`s.] (Biol.) Pertaining to, or characterized by, or living in, a state of symbiosis. -- {Sym`bi*ot"ic*al}, a. -- {Sym`bi*ot"ic*al*ly}, adv. [Webster 1913 Suppl.]