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[het-uh-ree-siz-uh m] /ˌhɛt əˈri sɪz əm/
noun, Biology.
the development of different stages of a parasitic species on different host plants.
Origin of heteroecism
1870-75; hetero- + Greek oik(ía) “house” + -ism
Related forms
[het-uh-ree-shuh s] /ˌhɛt əˈri ʃəs/ (Show IPA),
heteroeciously, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for heteroecious


(of parasites, esp rust fungi) undergoing different stages of the life cycle on different host species Compare autoecious
Derived Forms
heteroecism, noun
Word Origin
from hetero- + -oecious, from Greek oikia house
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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heteroecious in Medicine

heteroecious het·er·oe·cious (hět'ə-rē'shəs)
Spending different stages of a life cycle on different, usually unrelated hosts. Used of parasites such as rust fungi and tapeworms.

het'er·oe'cism (-sĭz'əm) n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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heteroecious in Science
Relating to a parasite that spends different stages of its life cycle on different, usually unrelated hosts. The term is used especially of certain kinds of rust fungi, but may also be applied to other parasites like tapeworms. Compare autoecious.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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