heterogamyn.

/hɛtəˈrɒɡəmi/

Etymology: formed as heterogamous adj. + -y suffix³; compare French hétérogamie (1842).

The quality or condition of being heterogamous.

1. Botany. Mediate or indirect fertilization of plants.

ΚΠ

1874 R. Brown Man. Bot. ix. 418 These circuitous methods of fertilisation may be called Heterogamy, or ‘crooked fertilisation,’ in contradistinction to the typical and orthodox method, which may be styled Orthogamy, or direct (‘straight’) fertilisation.

2. Biology. The succession of differently organized generations of animals or plants, as where sexual generation alternates with parthenogenesis.

ΘΚΠ

the world > life > biology > biological processes > procreation or reproduction > types of reproduction > [noun] > alternate generation

alternate generation1841

alternation of generations1845

metagenesis1849

heterogenesis1863

heterogamy1884

heterogeny1886

heterogony1906

1884 A. Sedgwick & F. G. Heathcote tr. C. Claus Elem. Text-bk. Zool.: Protozoa to Insecta 543 Chermes affords an example of heterogamy in that two different oviparous generations follow one another: a slender and winged summer generation, and an apterous generation which is found in autumn and spring and lives through the winter.

1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) Introd. p. xxxi Alternation of Generations..whether in the form known as metagenesis, i.e. the alternation of asexual and sexual individuals, or as heterogamy, i.e. the alternation of parthenogenetic and sexual races.

1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 508 [In Insects] Alternation of Generations is coupled with parthenogenesis, and is known in this case as Heterogamy.

1889 P. Geddes & J. A. Thomson Evol. Sex xv. 207 A sexless fern-plant forms special reproductive cells (spores), which develop parthenogenetically into a sexual prothallus, from the fertilised egg-cell of which the fernplant arises..[this] is called by zoologists, in reference to flukes for instance, heterogamy.

3. Biology (a) The condition of having or producing heterogametes; reproduction involving heterogametes. (b) Heterogamous reproduction.

ΘΚΠ

the world > life > biology > biological processes > procreation or reproduction > types of reproduction > [noun] > others

adosculation1682

autogeny?1818

gemmation1836

parthenogenesis1849

virgin production1849

rejuvenescence1853

agamogenesis1857

monogeny1857

autogenesis1858

homogenesis1858

proliferation1864

monogenesis1866

swarming1867

paedogenesis1870

monogony1873

virginal generation1879

division1880

monogenesy1890

parthenogeny1890

anisogamy1891

isogamy1891

paragamy1891

separation1891

paedogenesis1892

parthenism1892

heterogamy1894

thelytoky1895

flagellation1898

cytogamy1899

pseudogamy1900

tychoparthenogenesis1900

syngamy1904

pseudogamy1907

ectogenesis1909

paedogamy1910

apomixis1913

progenesis1934

agamospermy1939

mixis1944

somatogamy1949

decapitation-

the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > gametes > state of

heterogamy1894

heterogamety1932

homogamety1939

1894 S. H. Vines Students' Text-bk. Bot. iii. 275 Heterogamy:—a. Oogamy: sexual cells, oospheres and undifferentiated male cells... b. Carpogamy: no differentiated female cell.

1897 Ann. Bot. 11 106 Isogamy, heterogamy, and conjugation have been observed.

1897 Ann. Bot. 11 118 The curious heterogamy of Aphanochaete.

1925 E. B. Wilson Cell (ed. 3) vii. 584 A third type is true heterogamy... The gametes are here widely different from each other.

1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) III. 83/2 Heterogamy is also characteristic of land plants and is regarded as the most advanced type of sexual reproduction.

Derivatives

heteroˈgamic adj. characterized by heterogamy (sense 3).

ΘΚΠ

the world > life > biology > biological processes > procreation or reproduction > types of reproduction > [adjective] > alternate generation

metagenetic1849

heterogenetic1872

metagenic1883

heterogenic1901

heterogamic1904

1904 Science 3 June 866/1 In the heterogamic subdivision of the homothallic group, a distinct and constant differentiation exists between the zygophoric hyphæ and the gametes derived from them.

1904 Proc. Amer. Acad. Arts & Sci. 40 210 Two genera of the homothallic group..are heterogamic in that their gametes show a certain constant inequality in size.

1927 H. Gwynne-Vaughan & B. F. Barnes Struct. & Devel. Fungi 112 None of the heterothallic forms among the mucors is known to be heterogamic.

This entry has not yet been fully updated (first published 1898; most recently modified version published online June 2018).

单词	heterogamy
释义	heterogamyn. /hɛtəˈrɒɡəmi/ Etymology: formed as heterogamous adj. + -y suffix³; compare French hétérogamie (1842). The quality or condition of being heterogamous. 1. Botany. Mediate or indirect fertilization of plants. ΚΠ 1874 R. Brown Man. Bot. ix. 418 These circuitous methods of fertilisation may be called Heterogamy, or ‘crooked fertilisation,’ in contradistinction to the typical and orthodox method, which may be styled Orthogamy, or direct (‘straight’) fertilisation. 2. Biology. The succession of differently organized generations of animals or plants, as where sexual generation alternates with parthenogenesis. ΘΚΠ the world > life > biology > biological processes > procreation or reproduction > types of reproduction > [noun] > alternate generation alternate generation1841 alternation of generations1845 metagenesis1849 heterogenesis1863 heterogamy1884 heterogeny1886 heterogony1906 1884 A. Sedgwick & F. G. Heathcote tr. C. Claus Elem. Text-bk. Zool.: Protozoa to Insecta 543 Chermes affords an example of heterogamy in that two different oviparous generations follow one another: a slender and winged summer generation, and an apterous generation which is found in autumn and spring and lives through the winter. 1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) Introd. p. xxxi Alternation of Generations..whether in the form known as metagenesis, i.e. the alternation of asexual and sexual individuals, or as heterogamy, i.e. the alternation of parthenogenetic and sexual races. 1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 508 [In Insects] Alternation of Generations is coupled with parthenogenesis, and is known in this case as Heterogamy. 1889 P. Geddes & J. A. Thomson Evol. Sex xv. 207 A sexless fern-plant forms special reproductive cells (spores), which develop parthenogenetically into a sexual prothallus, from the fertilised egg-cell of which the fernplant arises..[this] is called by zoologists, in reference to flukes for instance, heterogamy. 3. Biology (a) The condition of having or producing heterogametes; reproduction involving heterogametes. (b) Heterogamous reproduction. ΘΚΠ the world > life > biology > biological processes > procreation or reproduction > types of reproduction > [noun] > others adosculation1682 autogeny?1818 gemmation1836 parthenogenesis1849 virgin production1849 rejuvenescence1853 agamogenesis1857 monogeny1857 autogenesis1858 homogenesis1858 proliferation1864 monogenesis1866 swarming1867 paedogenesis1870 monogony1873 virginal generation1879 division1880 monogenesy1890 parthenogeny1890 anisogamy1891 isogamy1891 paragamy1891 separation1891 paedogenesis1892 parthenism1892 heterogamy1894 thelytoky1895 flagellation1898 cytogamy1899 pseudogamy1900 tychoparthenogenesis1900 syngamy1904 pseudogamy1907 ectogenesis1909 paedogamy1910 apomixis1913 progenesis1934 agamospermy1939 mixis1944 somatogamy1949 decapitation- the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > gametes > state of heterogamy1894 heterogamety1932 homogamety1939 1894 S. H. Vines Students' Text-bk. Bot. iii. 275 Heterogamy:—a. Oogamy: sexual cells, oospheres and undifferentiated male cells... b. Carpogamy: no differentiated female cell. 1897 Ann. Bot. 11 106 Isogamy, heterogamy, and conjugation have been observed. 1897 Ann. Bot. 11 118 The curious heterogamy of Aphanochaete. 1925 E. B. Wilson Cell (ed. 3) vii. 584 A third type is true heterogamy... The gametes are here widely different from each other. 1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) III. 83/2 Heterogamy is also characteristic of land plants and is regarded as the most advanced type of sexual reproduction. Derivatives heteroˈgamic adj. characterized by heterogamy (sense 3). ΘΚΠ the world > life > biology > biological processes > procreation or reproduction > types of reproduction > [adjective] > alternate generation metagenetic1849 heterogenetic1872 metagenic1883 heterogenic1901 heterogamic1904 1904 Science 3 June 866/1 In the heterogamic subdivision of the homothallic group, a distinct and constant differentiation exists between the zygophoric hyphæ and the gametes derived from them. 1904 Proc. Amer. Acad. Arts & Sci. 40 210 Two genera of the homothallic group..are heterogamic in that their gametes show a certain constant inequality in size. 1927 H. Gwynne-Vaughan & B. F. Barnes Struct. & Devel. Fungi 112 None of the heterothallic forms among the mucors is known to be heterogamic. This entry has not yet been fully updated (first published 1898; most recently modified version published online June 2018). < n.1874
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