dimorphism


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to dimorphism: Gender dimorphism

dimorphism

 [di-mor´fizm]
the quality of existing in two distinct forms. adj., adj dimor´phic, dimor´phous.
sexual dimorphism physical or behavioral differences associated with sex.
having some properties of both sexes, as in the early embryo and in some hermaphrodites.

di·mor·phism

(dī-mōr'fizm),
1. Existence in two shapes or forms; denoting a difference of crystalline form exhibited by the same substance, or a difference in form or outward appearance between individuals of the same species (for example, sexual dimorphism).
2. The occurrence in plants of two distinct forms of leaves or other parts in the same individual plant.
[G. di-, two, + morphē, shape]

dimorphism

/di·mor·phism/ (di-mor´fizm) the quality of existing in two distinct forms.dimor´phicdimor´phous
sexual dimorphism 
1. physical or behavioral differences associated with sex.
2. having some properties of both sexes, as in the early embryo and in some hermaphrodites.

dimorphism

(dī-môr′fĭz′əm)
n.
1. Biology The existence among animals of the same species of two distinct forms that differ in one or more characteristics, such as coloration, size, or shape.
2. Botany The occurrence of two distinct forms of the same parts in one plant, as in the juvenile and adult leaves of ivy.
3. Chemistry & Physics Dimorphic crystallization.

di·mor·phism

(dī-mōr'fizm)
Existence in two shapes or forms; denoting a difference of crystalline form exhibited by the same substance, or a difference in form or outward appearance between individuals of the same species.
[G. di-, two, + morphē, shape]

dimorphism

the occurrence of an organism in two forms, e.g. the male and the female (see SEXUAL DIMORPHISM). Dimorphism can occur in body form or in colour phases, e.g. the two-spotted ladybird which has a brown form with four red spots, and a red form with two dark spots. See GENETIC POLYMORPHISM.

dimorphism

the quality of existing in two distinct forms.

sexual dimorphism
1. physical or behavioral differences associated with sex; males and females of the same species are different in appearance.
2. having some properties of both sexes, as in the early embryo and in some hermaphrodites.
References in periodicals archive ?
Previous studies have determined the sexual dimorphism and bilateral asymmetry of auricle using ear lengths and widths, lobule lengths and widths, and the conchal length and width.
2010: Sexual dimorphism and use of morphological measurements to sex adults, immatures and chicks of rockhopper penguins.
Thus, rural communities are predicted to display greater levels of sexual dimorphism in lower limb rigidity than the urban sample.
Thus, the sexual dimorphism of the digestive tract discovered in this study may contribute to the energy requirement of reproduction, which requires females to intake and absorb more energy.
Averages of mean values for the degree of sexual dimorphism across localities ranged from 1.
Sexual size dimorphism in raptors: intrasexual competition in the larger sex for a scare breeding resource, the smaller sex.
Reliability of sexual dimorphism depends on magnitude of sexual dimorphism exhibited in a population, availability of skeletal elements, anatomical areas of the bone preserved and degree of preservation.
Sexual dimorphism and discriminant function sexing in indigenous South African Crania Homo 2005; 55: 213-28.
While we previously demonstrated the male-dominant sexual dimorphism of the spinal GRP system which plays an important role in the male reproductive function in adult rats, (12) little is known about the developmental changes in the spinal center during ontogeny.
Sexual dimorphism may be an evolutionary adaptative mechanism favouring sexual selection, acting on males when females for choosing partners for mating and in mate competition, enhancing selection towards certain male traits (Hedrick & Temeles, 1989).
Reduction behavior of phenotypic correlations and phenotypic ratios owing to the aging of the animals indicate that the prolongation of the culture period enhances phenotypic differences between males and females, with an underscoring of sexual dimorphism as previously reported by Bhatta et al.