prebiotic /pɹiːbaɪˈɒtɪk/adjective 2noun 1forms 1 adjective2 •Of a food, not digestible, but beneficial.The table below includes plant foods we consider to be prebiotic “stars” since they are the foods listed in the scientific literature as sources of prebiotics. — 2009 •Before the advent of life.The chemistry of cyanoacetylene, HC₃N, can lead in aqueous solution to the prebiotic synthesis of pyrimidines. — 2006 noun[in the plural]1 •A substance in food that is hard to digest and promotes the growth of beneficial intestinal microorganisms.The table below includes plant foods we consider to be prebiotic “stars” since they are the foods listed in the scientific literature as sources of prebiotics. — 2009 formsprebiotics