microsporen.

Brit.

/ˈmʌɪkrə(ʊ)spɔː/, U.S.

/ˈmaɪkroʊˌspɔr/,

/ˈmaɪkrəˌspɔr/

Origin: Formed within English, by compounding. Etymons: micro- comb. form, spore n.

Etymology: < micro- comb. form + spore n. In sense 1 after French microspore (D. Gruby 1843, in Comptes rendus de l'Acad. des Sci. 17 302).

†1. Medicine. A dermatophytic fungus of the genus Microsporum. Obsolete. rare.

ΘΚΠ

the world > plants > particular plants > plants perceived as weeds or harmful plants > poisonous or harmful plants > harmful or parasitic fungi > [noun] > microscopic

microspore1857

trichophyte1862

Peronospora1867

microsporon1876

thrush-fungus1890

the world > health and disease > ill health > a disease > disorders of visible parts > skin disorders > [noun] > ring-worm or favus > fungus

microspore1857

microsporon1876

1857 R. G. Mayne Expos. Lexicon Med. Sci. (1860) Microsporum, term for the cryptogamious plant in Porrigo decalvans,..a microspore.

1899 T. C. Allbutt et al. Syst. Med. VIII. 855 The microspores and trichophytes all belong to the same family.

2. Botany. The smaller of the two types of spore produced by heterosporous cryptogams, which develops into the male gametophyte. Also: the analogous structure in seed plants (i.e. the immature pollen grain); the smaller of two types of spore produced by certain fungi.

ΘΚΠ

the world > plants > part of plant > reproductive part(s) > spore or sporule > [noun] > type of > microspore or microsporange

microspore1857

microsporange1882

1857 A. Henfrey Elem. Course Bot. 598 It has been long known that the Lycopodiaceae and the Marsilaceae produce spores of different kinds, unlike especially in size, so that they are conveniently distinguished as microspores and megaspores.

1858 E. Lankester & W. B. Carpenter Veg. Physiol. (new ed.) §734 One containing a mass of fine powdery granules (microspores); the other including only three or four roundish fleshy bodies (megaspores).

1877 J. Le Conte Elements Geol. (1879) 355 [There are in Lepidodendrids] two kinds of spores—microspores and macrospores—corresponding to stamens and pistils.

1938 G. M. Smith Cryptogamic Bot. II. x. 272 The heterospory was pronounced, the macrospores having a diameter about ten times that of microspores.

1964 E. J. H. Corner Life of Plants x. 177 The male spores [in Selaginella, etc.], called microspores because of their small size, are produced in large numbers in microsporangia.

1983 J. R. S. Fincham Genetics ii. 57 The microspores are the pollen grains, formed in tetrads by meiosis within the anther.

1992 M. Ingrouille Diversity & Evol. Land Plants 109 Selaginella and Isoetes are pteridophytes with endosporic development. Within the microspore the first cell division produces a sterile prothallial cell and an antheridial cell.

3. Zoology. A small spore produced by certain protoctists.

ΘΚΠ

the world > animals > invertebrates > protozoa > [noun] > member of > parts of > spore-like form

microspore1881

chlamydospore1910

1881–2 W. Saville-Kent Man. Infusoria II. 870 Microspores. The spore-like elements, of exceedingly minute size but very numerous, produced through the encystment and subsequent subdivision of many monads.

1896 J. W. Kirkaldy & E. C. Pollard tr. J. E. V. Boas Text Bk. Zool. 90 Sometimes in one and the same central capsule two kinds of spores arise, larger and smaller, macro- and micro-spores.

1905 J. McCabe tr. E. Haeckel Evol. Man I. 140 The smaller microspores have the same shape as the larger macrospores.

1997 Acta Protozool. 36 295 Microspores..are dominant [in Intexta acarivora].

This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).

单词	microspore
释义	microsporen. Brit. /ˈmʌɪkrə(ʊ)spɔː/, U.S. /ˈmaɪkroʊˌspɔr/, /ˈmaɪkrəˌspɔr/ Origin: Formed within English, by compounding. Etymons: micro- comb. form, spore n. Etymology: < micro- comb. form + spore n. In sense 1 after French microspore (D. Gruby 1843, in Comptes rendus de l'Acad. des Sci. 17 302). †1. Medicine. A dermatophytic fungus of the genus Microsporum. Obsolete. rare. ΘΚΠ the world > plants > particular plants > plants perceived as weeds or harmful plants > poisonous or harmful plants > harmful or parasitic fungi > [noun] > microscopic microspore1857 trichophyte1862 Peronospora1867 microsporon1876 thrush-fungus1890 the world > health and disease > ill health > a disease > disorders of visible parts > skin disorders > [noun] > ring-worm or favus > fungus microspore1857 microsporon1876 1857 R. G. Mayne Expos. Lexicon Med. Sci. (1860) Microsporum, term for the cryptogamious plant in Porrigo decalvans,..a microspore. 1899 T. C. Allbutt et al. Syst. Med. VIII. 855 The microspores and trichophytes all belong to the same family. 2. Botany. The smaller of the two types of spore produced by heterosporous cryptogams, which develops into the male gametophyte. Also: the analogous structure in seed plants (i.e. the immature pollen grain); the smaller of two types of spore produced by certain fungi. ΘΚΠ the world > plants > part of plant > reproductive part(s) > spore or sporule > [noun] > type of > microspore or microsporange microspore1857 microsporange1882 1857 A. Henfrey Elem. Course Bot. 598 It has been long known that the Lycopodiaceae and the Marsilaceae produce spores of different kinds, unlike especially in size, so that they are conveniently distinguished as microspores and megaspores. 1858 E. Lankester & W. B. Carpenter Veg. Physiol. (new ed.) §734 One containing a mass of fine powdery granules (microspores); the other including only three or four roundish fleshy bodies (megaspores). 1877 J. Le Conte Elements Geol. (1879) 355 [There are in Lepidodendrids] two kinds of spores—microspores and macrospores—corresponding to stamens and pistils. 1938 G. M. Smith Cryptogamic Bot. II. x. 272 The heterospory was pronounced, the macrospores having a diameter about ten times that of microspores. 1964 E. J. H. Corner Life of Plants x. 177 The male spores [in Selaginella, etc.], called microspores because of their small size, are produced in large numbers in microsporangia. 1983 J. R. S. Fincham Genetics ii. 57 The microspores are the pollen grains, formed in tetrads by meiosis within the anther. 1992 M. Ingrouille Diversity & Evol. Land Plants 109 Selaginella and Isoetes are pteridophytes with endosporic development. Within the microspore the first cell division produces a sterile prothallial cell and an antheridial cell. 3. Zoology. A small spore produced by certain protoctists. ΘΚΠ the world > animals > invertebrates > protozoa > [noun] > member of > parts of > spore-like form microspore1881 chlamydospore1910 1881–2 W. Saville-Kent Man. Infusoria II. 870 Microspores. The spore-like elements, of exceedingly minute size but very numerous, produced through the encystment and subsequent subdivision of many monads. 1896 J. W. Kirkaldy & E. C. Pollard tr. J. E. V. Boas Text Bk. Zool. 90 Sometimes in one and the same central capsule two kinds of spores arise, larger and smaller, macro- and micro-spores. 1905 J. McCabe tr. E. Haeckel Evol. Man I. 140 The smaller microspores have the same shape as the larger macrospores. 1997 Acta Protozool. 36 295 Microspores..are dominant [in Intexta acarivora]. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022). < n.1857
随便看	θ168616 θ168617 θ168618 θ168619 θ168620 θ168621 θ168622 θ168623 θ168624 θ168625 θ168626 θ168627 θ168629 θ16863 θ168630 θ168631 θ168632 θ168633 θ168634 θ168635 θ168636 θ168637 θ168638 θ168639 θ16864