[zahy-guh-mawr-fik, zig-uh-]
adjective Biology.
having bilateral symmetry; divisible lengthwise into similar or symmetrical halves.
Also, zygomorphous.

1870–75; zygo- + -morphic

zygomorphism, zygomorphy, noun
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World English Dictionary
zygomorphic or zygomorphous (ˌzaɪɡəʊˈmɔːfɪk, ˌzɪɡ-)
See also actinomorphic (of a flower) capable of being cut in only one plane so that the two halves are mirror images
zygomorphous or zygomorphous
zygo'morphism or zygomorphous
'zygomorphy or zygomorphous

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

zygomorphic zy·go·mor·phic (zī'gə-môr'fĭk, zĭg'ə-) or zy·go·mor·phous (-fəs)
Bilaterally symmetrical. Used of organisms or parts.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
zygomorphic   (zī'gə-môr'fĭk, zĭg'ə-)  Pronunciation Key 
Relating to a flower that can be divided into equal halves along only one line; bilaterally symmetrical. The flowers of the iris and the snapdragon are zygomorphic. Compare actinomorphic.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences for zygomorphic
The flowers of the vast majority of the species are zygomorphic with bilateral symmetry.
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