biotrophic
/ˌbʌɪə(ʊ)ˈtrɒfɪk/ /ˌbʌɪə(ʊ)ˈtrəʊfɪk/adjective
Plant Pathol. Of a parasite, especially a fungus: that derives nutrition from living cells of a host plant.
Origin
Early 20th century (in an earlier sense). From bio- + -trophic. With sense 1 compare slightly earlier abiotrophic and see quot. 1902 at sense 1.