macrosporen.

Brit.

/ˈmakrə(ʊ)spɔː/, U.S.

/ˈmækrəˌspɔr/

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

Etymology: < macro- comb. form + spore n. Compare French macrospore (1842). Compare megaspore n., and microspore n.

1. Botany and Mycology. The larger of the two types of spore produced by a heterosporous plant (now usually called megaspore); (also) the larger of the two types of spore produced by some fungi.

ΘΚΠ

the world > plants > part of plant > reproductive part(s) > seed > [noun] > parts of > embryo-sac

embryo sac1837

macrospore1855

megaspore1857

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

macrospore1855

megaspore1857

gynospore1900

the world > animals > invertebrates > protozoa > class Flagellata or Mastigophora > subclass Flagellidia > [noun] > order Monadida > member of > spore-like part

macrospore1855

1855 J. B. Sanderson in Todd's Cycl. Anat. & Physiol. V. 243/1 The development of the prothallium commences..several months after the macrospore has been sown.

1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. 335 The separation of the sexes is already prefigured by the two kinds of spores, the Macrospores being female, in so far as they develope a small prothallium.

1938 G. M. Smith Cryptogamic Bot. II. ix. 358 The functional macrospore lies in the large massula at the base of a sporangium.

1965 K. Esau Plant Anat. (ed. 2) xviii. 563 The ovule developing from the placenta of the ovary is the seat of formation of the megaspores (or macrospores).

1977 Mycopathologia 61 27 Careful examination of these [spore trap deposits] failed to reveal typical arthrospores or Fusarium macrospores despite substantial recoveries of corresponding growth in culture.

1993 Theoret. & Appl. Genetics 85 873 All plants produced tetranucleated microspores and jumbo pollen..as well as bi- and trinucleated macrospores.

2. Biology. A large spore (usually the larger of two types of spore) produced by various protoctists.

ΘΚΠ

the world > life > biology > organism > micro-organism > [noun]

microphyte1859

microzoon1859

microzoary1863

mycetes1874

spore1876

microbe1880

microorganism1880

microzooid1881

microbion1883

bug1885

macrospore1888

microzoan1890

microzoarian1890

zymophyte1890

germ1897

bot1937

probiotic1974

1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 880 It [sc. the anisospore] is of two sizes; a large, the macrospore..and a small, the microspore, one half less in all dimensions.

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.

1992 Jrnl. Protozool. 39 432 The microsporidium Janacekia adipophila n. sp., a parasite of Ptychoptera paludosa larvae in Sweden, is described... Macrospores are formed in small numbers.

This entry has been updated (OED Third Edition, March 2000; most recently modified version published online June 2022).

单词	macrospore
释义	macrosporen. Brit. /ˈmakrə(ʊ)spɔː/, U.S. /ˈmækrəˌspɔr/ Origin: Formed within English, by compounding. Etymons: macro- comb. form, spore n. Etymology: < macro- comb. form + spore n. Compare French macrospore (1842). Compare megaspore n., and microspore n. 1. Botany and Mycology. The larger of the two types of spore produced by a heterosporous plant (now usually called megaspore); (also) the larger of the two types of spore produced by some fungi. ΘΚΠ the world > plants > part of plant > reproductive part(s) > seed > [noun] > parts of > embryo-sac embryo sac1837 macrospore1855 megaspore1857 the world > plants > part of plant > reproductive part(s) > spore or sporule > [noun] > type of > megaspore or megasporange macrospore1855 megaspore1857 gynospore1900 the world > animals > invertebrates > protozoa > class Flagellata or Mastigophora > subclass Flagellidia > [noun] > order Monadida > member of > spore-like part macrospore1855 1855 J. B. Sanderson in Todd's Cycl. Anat. & Physiol. V. 243/1 The development of the prothallium commences..several months after the macrospore has been sown. 1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. 335 The separation of the sexes is already prefigured by the two kinds of spores, the Macrospores being female, in so far as they develope a small prothallium. 1938 G. M. Smith Cryptogamic Bot. II. ix. 358 The functional macrospore lies in the large massula at the base of a sporangium. 1965 K. Esau Plant Anat. (ed. 2) xviii. 563 The ovule developing from the placenta of the ovary is the seat of formation of the megaspores (or macrospores). 1977 Mycopathologia 61 27 Careful examination of these [spore trap deposits] failed to reveal typical arthrospores or Fusarium macrospores despite substantial recoveries of corresponding growth in culture. 1993 Theoret. & Appl. Genetics 85 873 All plants produced tetranucleated microspores and jumbo pollen..as well as bi- and trinucleated macrospores. 2. Biology. A large spore (usually the larger of two types of spore) produced by various protoctists. ΘΚΠ the world > life > biology > organism > micro-organism > [noun] microphyte1859 microzoon1859 microzoary1863 mycetes1874 spore1876 microbe1880 microorganism1880 microzooid1881 microbion1883 bug1885 macrospore1888 microzoan1890 microzoarian1890 zymophyte1890 germ1897 bot1937 probiotic1974 1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 880 It [sc. the anisospore] is of two sizes; a large, the macrospore..and a small, the microspore, one half less in all dimensions. 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. 1992 Jrnl. Protozool. 39 432 The microsporidium Janacekia adipophila n. sp., a parasite of Ptychoptera paludosa larvae in Sweden, is described... Macrospores are formed in small numbers. This entry has been updated (OED Third Edition, March 2000; most recently modified version published online June 2022). < n.1855
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