zygomorphicadj.
/zʌɪɡə(ʊ)ˈmɔːfɪk/, /zɪɡə(ʊ)ˈmɔːfɪk/, U.S. /ˌzaɪɡəˈmɔrfɪk/ Botany.
Applied to a flower that is symmetrical about a single plane, i.e. divisible into similar lateral halves in only one way; = monosymmetrical adj.
ΘΚΠ
the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > [adjective] > having specific arrangement or number of member parts
regular1760
decandrous1808
irregular1826
tetramerous1835
pentamerous1848
symmetrical1849
hexamerous1857
isomerous1857
octamerous1857
anisomerous1861
octomeral1871
hemicyclic1875
zygomorphic1875
zygomorphous1879
tetracyclic1880
heteromerous1882
heterocyclic1895
oligomerous1897
pleiomerous1898
decasepalous-
1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. 526 In Orchids both whorls are developed in a petaloid, and like the whole flower in a zygomorphic or monosymmetrical manner.
Derivatives
zygoˈmorphous adj. opposed to actinomorphous adj.
ΘΚΠ
the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > [adjective] > having specific arrangement or number of member parts
regular1760
decandrous1808
irregular1826
tetramerous1835
pentamerous1848
symmetrical1849
hexamerous1857
isomerous1857
octamerous1857
anisomerous1861
octomeral1871
hemicyclic1875
zygomorphic1875
zygomorphous1879
tetracyclic1880
heteromerous1882
heterocyclic1895
oligomerous1897
pleiomerous1898
decasepalous-
1879 A. Gray in A. Gray & G. L. Goodale Bot. Text-bk. (ed. 6) I. 175 (note) Both these forms [sc. monosymmetrical and polysymmetrical] have a more expressive and older terminology, adopted by Eichler, viz.:—Zygomorphous, for flowers, or other structures, which can be bisected in one plane,..(median zygomorphous, when this is a median or anteroposterior plane,..transverse zygomorphous, when the plane of section is transverse or at right angles to the median).
zygoˈmorphism n. the character of being zygomorphic.
ΘΚΠ
the world > plants > part of plant > (defined by) distribution, arrangement, or position > [noun] > monosymmetry or polysymmetry
monosymmetry1875
polysymmetry1875
zygomorphism1875
1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. 534 The zygomorphism of the flower.
This entry has not yet been fully updated (first published 1921; most recently modified version published online March 2022).
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adj.1875