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 (zī′gə-môr′fĭk, zĭg′ə-) also zy·go·mor·phous (-fəs)
adj. Botany
Having bilateral symmetry, as the flowers of a pea plant.

zy′go·mor′phy n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˌzaɪɡəʊˈmɔːfɪk; ˌzɪɡ-) or


(Botany) (of a flower) capable of being cut in only one plane so that the two halves are mirror images. See also actinomorphic
ˌzygoˈmorphism, ˈzygoˌmorphy n
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.zygomorphic - capable of division into symmetrical halves by only one longitudinal plane passing through the axis
biological science, biology - the science that studies living organisms
actinomorphic, actinomorphous - capable of division into symmetrical halves by any longitudinal plane passing through the axis
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The corolla-lobes exhibit a little variation among themselves with respect to their shape and size, thereby imparting a slight zygomorphy to the floral symmetry.
Floral symmetry is an important trait both in taxonomy and in pollination systems, and normally zygomorphy is thought to be more specialized in pollination adaptations, since it restricts pollinator behaviors and can therefore increase pollination efficiency (Sargent, 2004; Gong & Huang, 2009).
Zygomorphy (or when a flower can only be divided down the middle to make two equal mirror images) is thought to restrict the types of pollinators that can take nectar and pollen from the flower.
Thus, bilateral symmetry (zygomorphy) becomes "monosymmetry," radial symmetry (actinomorphy) becomes "polysymmetry," and subtending bract becomes "pherophyll" (but when you look up pherophyll in the glossary, it says "see subtending bract").