dimorphism

Definitions

  • WordNet 3.6
    • n dimorphism (biology) the existence of two forms of individual within the same animal species (independent of sex differences)
    • n dimorphism (chemistry) the property of certain substances that enables them to exist in two distinct crystalline forms
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Webster's Revised Unabridged Dictionary
    • Dimorphism (Crystallog) Crystallization in two independent forms of the same chemical compound, as of calcium carbonate as calcite and aragonite.
    • Dimorphism (Biol) Difference of form between members of the same species, as when a plant has two kinds of flowers, both hermaphrodite (as in the partridge berry), or when there are two forms of one or both sexes of the same species of butterfly. "Dimorphism is the condition of the appearance of the same species under two dissimilar forms."
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Century Dictionary and Cyclopedia
    • n dimorphism The property of assuming or of existing under two distinct forms. Specifically
    • n dimorphism In crystallography, the property of assuming two distinct crystalline forms not derivable from each other, as by crystallization. Thus, sulphur assumes one form when crystallizing at a high temperature, and another wholly different when becoming solid at the ordinary temperature. Hence, the same chemical substance may form two or more distinct mineral species. Carbon in one form is the diamond, in another graphite, etc.
    • n dimorphism In botany, the occurrence of two distinct forms of flowers or other parts upon the same plant, or upon plants of the same species.
    • n dimorphism In zoology, difference of form, structure, size, coloration, etc., between individuals of the same species. Sexual dimorphism is the rule in the animal kingdom; and differences between the male and female other than in the sexual organs, as well as constant differences between individuals of each sex, without reference to sex, are instances of dimorphism.
    • n dimorphism In philology, the existence of a word under two or more forms called doublets; thus, dent and dint, fat and vat, church and kirk, exhibit dimorphism developed within English, and card and chart, choir, quire, and chorus, reason, ration, ratio, etc., exhibit dimorphism arising outside of English.
    • n dimorphism In petrography, modifications produced within the magma of an igneous rock by mineralizing or crystallizing agents before its solidification.
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Chambers's Twentieth Century Dictionary
    • n Dimorphism dī-mor′fizm (bot.) a state in which two forms of flower, leaf, &c. are produced by the same species of plant: the property of crystallising in two forms
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Etymology

Webster's Revised Unabridged Dictionary
Cf. F. dimorphisme,
Chambers's Twentieth Century Dictionary
Gr. di-, twice, morphē, form.

Usage

In literature:

There are, also, cases of dimorphism and trimorphism, both with animals and plants.
"On the Origin of Species" by Charles Darwin
Zeitung' of my paper on the offspring of dimorphic plants.
"The Life and Letters of Charles Darwin, Volume II (of II)" by Charles Darwin
Any member of the Lythraceae raised from seed ought to be well looked after for dimorphism.
"More Letters of Charles Darwin" by Charles Darwin
The fact of both the forms presenting the same case of dimorphism is very curious.
"More Letters of Charles Darwin Volume II" by Charles Darwin
Mercuric iodide also exhibits dimorphism.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1" by Various
As in the species previously described the spermatozoa are evidently dimorphic.
"Studies in Spermatogenesis" by Nettie Maria Stevens
Metacinnabarite is a cubic form of mercuric sulphide, this compound being dimorphous.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 4" by Various
Absence of sexual dimorphism in the Bell Vireo obviously suggests that behavioral criteria are used by the birds in sex-recognition.
"Natural History of the Bell Vireo, Vireo bellii Audubon" by Jon C. Barlow
There is marked sexual dimorphism.
"Handbook of Medical Entomology" by William Albert Riley
This difference recalls the sexual dimorphism of the eosin eye.
"Sex-linked Inheritance in Drosophila" by Thomas Hunt Morgan
It is a dimorphous substance existing in two enantiotropic forms, one melting at 26 deg.
"Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 6" by Various
This is a good example of "dimorphism," as it is termed.
"An Australian Bird Book" by John Albert Leach
What is sex dimorphism?
"A Guide for the Study of Animals" by Worrallo Whitney
Union of incipiently dimorphic (different) cells.
"Degeneracy" by Eugene S. Talbot
DIMORPHISM in females of water-beetles, i.
"The Descent of Man and Selection in Relation to Sex" by Charles Darwin
Dimorphism, the appearance of the same species in two different forms, sexual dimorphism, 122, 124.
"The Biological Problem of To-day" by Oscar Hertwig
Dimorphism or heterophylly is fairly common.
"Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7" by Various
Where the sexes are distinct, a more or less marked dimorphism often exists.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7" by Various
Flowers in many species imperfectly dioecious or dimorphous.
"The Manual of the Botany of the Northern United States" by Asa Gray
Like other dimorphic plants, ipecacuanha ripens seeds best when cross-fertilized, and presents various forms.
"Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 6" by Various
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In news:

Game designer-in-training Andrea Rubenstein has just published a great article about fantasy bodies in MMOs, focusing in particular on sexual dimorphism in World of Warcraft.
Polar bears exhibit sexual dimorphism.
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In science:

The network theory of gynandromorph development has direct relevance to understanding sexual dimorphism (differences in morphology between male and female organisms of the same species) and medical pathologies such as hemihyperplasia (asymmetric development of normally symmetric body parts in a unisexual individual).
A Developmental Network Theory of Gynandromorphs, Sexual Dimorphism and Species Formation
Related to this is the view is that hormones determine sexual dimorphism -the differences in morphology between males and females.
A Developmental Network Theory of Gynandromorphs, Sexual Dimorphism and Species Formation
It used be thought that sexual dimorphism, the difference in morphology of male and female animals, was due to hormones.
A Developmental Network Theory of Gynandromorphs, Sexual Dimorphism and Species Formation
As a consequence the whole view of sexual dimorphism (differences in the phenotype of males and females) and how, at least avian, gynandromorphs originate has changed.
A Developmental Network Theory of Gynandromorphs, Sexual Dimorphism and Species Formation
And, it confirms the network theory of gynandromorphs which states that, as is the case in the Rooster-Hen, the two dimorphic body halves are controlled in part by different developmental control networks.
A Developmental Network Theory of Gynandromorphs, Sexual Dimorphism and Species Formation
When subnetworks responsible for the sexual dimorphism of a species are interlinked in the same developing individual organism, then that organism can exhibit aspects of both sexes.
A Developmental Network Theory of Gynandromorphs, Sexual Dimorphism and Species Formation
Still on both accounts, for sexually dimorphic gynandromorphs both the male and female CENEs that control dimorphic differences in development must exist in the gynandromorph’s genome.
A Developmental Network Theory of Gynandromorphs, Sexual Dimorphism and Species Formation
Divergent subnetworks of the global developmental control network (the cenome) and not hormones determine the distinct morphology and function of sexually dimorphic organisms.
A Developmental Network Theory of Gynandromorphs, Sexual Dimorphism and Species Formation
Sex mosaics in a male dimorphic ant cardiocondyla kagutsuchi.
A Developmental Network Theory of Gynandromorphs, Sexual Dimorphism and Species Formation
Remes 2006), which he tentatively interpreted as representing sexual dimorphism.
Aspects of the history, anatomy, taxonomy and palaeobiology of sauropod dinosaurs
Examples for male dimorphism in other species are given in [105].
Biological Evolution and Statistical Physics
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