The Collaborative International Dictionary
Heteroecism
Heteroecious \Het`er*[oe]"cious\, a. [Hetero- + Gr. ? 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 aut[oe]cious. -- Het`er*[oe]"cism, n.