-heteroecious-

a. [ Hetero- + Gr. &unr_; house. ] (Bot.) Passing through the different stages in its life history on an alternation of hosts, as the common wheat-rust fungus (Puccinia graminis), and certain other parasitic fungi; -- contrasted with autœcious. -- Het`er*œ"cism n. [Webster 1913 Suppl.]