aecidiumn.

Brit.

/iːˈsɪdɪəm/, U.S.

/iˈsɪdiəm/

Inflections: Plural aecidia.

Forms:

α. 1700s– aecidium.

β. 1700s– oecidium.

Origin: A borrowing from Latin. Etymons: Latin Aecidium, Oecidium.

Etymology: In α. forms < scientific Latin Aecidium, former genus name ( J. Hill Gen. Nat. Hist. (1751) II. 64), originating as a misprint for Oecidium (see below). In β. forms < scientific Latin Oecidium, former genus name (attested separately as a genus name of the same genus of fungi from 1796 or earlier, but also occurring in the index to the work cited in quot. 1751 at sense 1) < ancient Greek oἰκίδιον small house ( < oἶκος house (see oecist n.) + -ίδιον -idium comb. form; misprinted in Hill (1751) as *oἰχίδιον ). In later use sometimes apprehended as if < ancient Greek αἰκία insulting treatment, torture, assault ( < αἰκής unseemly, shameful, in Hellenistic Greek also (of metal rust) injurious, deadly ( < ἀ- a- prefix⁶ + the same stem as εἰκών icon n.) + -ία -ia suffix¹) + scientific Latin -idium -idium comb. form. With sense 2 compare later aecium n. In plural form aecidia after the Latin plural form.

Mycology.

1. Any fungus of the former genus of pathogenic fungi, Aecidium, now known to represent the aecial stage (anamorph) of rusts of the genus Puccinia and other members of the order Uredinales. Also (in form Aecidium): the genus itself. Now rare.The genus name Aecidium is still occasionally used for the aecial stage of certain fungi, even when the sexual stage (teleomorph) is known.

ΘΚΠ

the world > plants > particular plants > fungi > [noun] > fungi groups or members

aecidium1751

Lactarius1821

Armillaria1829

russula1835

hyphomycetes1836

Penicillium1836

discomycete1842

Ascomycetes1857

Pyrenomycetes1857

coniomycetes1866

phalloid1880

gasteromycete1885

hymenomycete1887

Zygomycetes1887

phycomycete1889

autobasidiomycete1895

Phomopsis1911

Rhizoctonia1916

1751 J. Hill Gen. Nat. Hist. II. 65 The black, thinner Æcidium, growing under the barks of trees.

1796 Gentleman's Mag. Dec. 1000/1 Fungi. Divided into three orders.—..2. Solidi, containing 18 genera, viz...Reticularia, Clathrus, Œcidium.

1796 R. Pulteney Catal. Rare Plants 16/2 Anemony Æcidium. On the under side of the leaves of wood anemony.

1805 tr. K. L. Willdenow Princ. Bot. & Veg. Physiol. §312 344 Microscopical examination has shewn, that this rust-like matter consists of small fungi, which are called Aecidium, and the seeds of which form this brownish powder.

1849 Times 5 Oct. 3/4 The dust blight (æcidium) infests the gooseberry, and never, like the tuft blight (puccinia), attacks the sickly rose.

1882 Hardwicke’s Sci.-Gossip 18 198/1 We must regard the æcidium, the uredo, and the puccinia as different forms of the same fungus.

1951 Dict. Gardening (Royal Hort. Soc.) I. 51/2 Aecidium was once used as the generic name for a genus of fungi, but the organisms included in it are now known to be but one stage in the lives of Rust fungi, and this generic name is no longer needed or recognized.

2. Originally: an aecium. In later use: spec. one which is cup-shaped and which is enclosed within a protective membrane; cf. cluster-cup n. at cluster n. Compounds 2.

ΘΚΠ

the world > plants > particular plants > fungi > [noun] > parts of > reproductive parts

capsule1693

perithecium1800

aecidium1821

hymenium1830

pseudoperidium1832

pseudoperithecium1832

disc1842

trichidium1842

spicule1843

sporophore1849

stylospore1851

pycnide1856

cyst1857

pycnidium1857

basidium1858

cystidium1858

basidiospore1859

conidium1861

pollinarium1861

gonosphere1865

hymenophorum1866

spicula1866

teleutospore1866

promycelium1867

gonosphaerium1873

hymenophore1874

paracyst1874

sterigma1874

pollinodium1875

scolecite1875

uredospore1875

metuloid1879

operculum1879

uredo1879

aecidiospore1880

pycnidiospore1880

uredo-fruit1882

chlamydospore1884

teleutosorus1884

fruitcake1885

ascocarp1887

periplasm1887

pycnospore1887

pyrenocarp1887

macrostylospore1894

autobasidium1895

oidium1895

zygophore1904

aeciospore1905

aecium1905

pycniospore1905

teliospore1905

telium1905

uredinium1905

uredosorus1905

fruit-body1912

sporodochium1913

probasidium1916

fruiting body1918

pycnium1926

holobasidium1928

protoperithecium1937

uredium1937

1821 Time's Telescope: Guide to Almanack 261 The æcidium evidently derives nutriment from the apple, as round the verge of the spot the skin becomes wrinkled.

1878 W. R. McNab Bot.: Outl. Classif. Plants i. 56 The mycelium gives rise to small fruit-like bodies, the Æcidia.

1883 Midland Naturalist 4 49 This Puccinia (viz., graminis), then, begins its life in spring as an Œcidium, or cluster-cup, on the leaves of Berberis.

1905 Bismark (N. Dakota) Daily Tribune 14 June 2/3 The stage of the rust growth, known as the aecidium or cluster-cup stage is nearly a full month earlier this year than last season.

1964 Kew Bull. 19 80 Puccinia festucae has still to be collected on Rhum or Eigg, though its aecidia were present on Barra in April 1961.

2004 J. M. Suttie & S. G. Reynolds Fodder Oats xii. 199/2 These infections produce aecidia from which aeciospores arise and then infect the oats.

This entry has been updated (OED Third Edition, December 2011; most recently modified version published online December 2021).

单词	aecidium
释义	aecidiumn. Brit. /iːˈsɪdɪəm/, U.S. /iˈsɪdiəm/ Inflections: Plural aecidia. Forms: α. 1700s– aecidium. β. 1700s– oecidium. Origin: A borrowing from Latin. Etymons: Latin Aecidium, Oecidium. Etymology: In α. forms < scientific Latin Aecidium, former genus name ( J. Hill Gen. Nat. Hist. (1751) II. 64), originating as a misprint for Oecidium (see below). In β. forms < scientific Latin Oecidium, former genus name (attested separately as a genus name of the same genus of fungi from 1796 or earlier, but also occurring in the index to the work cited in quot. 1751 at sense 1) < ancient Greek oἰκίδιον small house ( < oἶκος house (see oecist n.) + -ίδιον -idium comb. form; misprinted in Hill (1751) as oἰχίδιον ). In later use sometimes apprehended as if < ancient Greek αἰκία* insulting treatment, torture, assault ( < αἰκής unseemly, shameful, in Hellenistic Greek also (of metal rust) injurious, deadly ( < ἀ- a- prefix⁶ + the same stem as εἰκών icon n.) + -ία -ia suffix¹) + scientific Latin -idium -idium comb. form. With sense 2 compare later aecium n. In plural form aecidia after the Latin plural form. Mycology. 1. Any fungus of the former genus of pathogenic fungi, Aecidium, now known to represent the aecial stage (anamorph) of rusts of the genus Puccinia and other members of the order Uredinales. Also (in form Aecidium): the genus itself. Now rare.The genus name Aecidium is still occasionally used for the aecial stage of certain fungi, even when the sexual stage (teleomorph) is known. ΘΚΠ the world > plants > particular plants > fungi > [noun] > fungi groups or members aecidium1751 Lactarius1821 Armillaria1829 russula1835 hyphomycetes1836 Penicillium1836 discomycete1842 Ascomycetes1857 Pyrenomycetes1857 coniomycetes1866 phalloid1880 gasteromycete1885 hymenomycete1887 Zygomycetes1887 phycomycete1889 autobasidiomycete1895 Phomopsis1911 Rhizoctonia1916 1751 J. Hill Gen. Nat. Hist. II. 65 The black, thinner Æcidium, growing under the barks of trees. 1796 Gentleman's Mag. Dec. 1000/1 Fungi. Divided into three orders.—..2. Solidi, containing 18 genera, viz...Reticularia, Clathrus, Œcidium. 1796 R. Pulteney Catal. Rare Plants 16/2 Anemony Æcidium. On the under side of the leaves of wood anemony. 1805 tr. K. L. Willdenow Princ. Bot. & Veg. Physiol. §312 344 Microscopical examination has shewn, that this rust-like matter consists of small fungi, which are called Aecidium, and the seeds of which form this brownish powder. 1849 Times 5 Oct. 3/4 The dust blight (æcidium) infests the gooseberry, and never, like the tuft blight (puccinia), attacks the sickly rose. 1882 Hardwicke’s Sci.-Gossip 18 198/1 We must regard the æcidium, the uredo, and the puccinia as different forms of the same fungus. 1951 Dict. Gardening (Royal Hort. Soc.) I. 51/2 Aecidium was once used as the generic name for a genus of fungi, but the organisms included in it are now known to be but one stage in the lives of Rust fungi, and this generic name is no longer needed or recognized. 2. Originally: an aecium. In later use: spec. one which is cup-shaped and which is enclosed within a protective membrane; cf. cluster-cup n. at cluster n. Compounds 2. ΘΚΠ the world > plants > particular plants > fungi > [noun] > parts of > reproductive parts capsule1693 perithecium1800 aecidium1821 hymenium1830 pseudoperidium1832 pseudoperithecium1832 disc1842 trichidium1842 spicule1843 sporophore1849 stylospore1851 pycnide1856 cyst1857 pycnidium1857 basidium1858 cystidium1858 basidiospore1859 conidium1861 pollinarium1861 gonosphere1865 hymenophorum1866 spicula1866 teleutospore1866 promycelium1867 gonosphaerium1873 hymenophore1874 paracyst1874 sterigma1874 pollinodium1875 scolecite1875 uredospore1875 metuloid1879 operculum1879 uredo1879 aecidiospore1880 pycnidiospore1880 uredo-fruit1882 chlamydospore1884 teleutosorus1884 fruitcake1885 ascocarp1887 periplasm1887 pycnospore1887 pyrenocarp1887 macrostylospore1894 autobasidium1895 oidium1895 zygophore1904 aeciospore1905 aecium1905 pycniospore1905 teliospore1905 telium1905 uredinium1905 uredosorus1905 fruit-body1912 sporodochium1913 probasidium1916 fruiting body1918 pycnium1926 holobasidium1928 protoperithecium1937 uredium1937 1821 Time's Telescope: Guide to Almanack 261 The æcidium evidently derives nutriment from the apple, as round the verge of the spot the skin becomes wrinkled. 1878 W. R. McNab Bot.: Outl. Classif. Plants i. 56 The mycelium gives rise to small fruit-like bodies, the Æcidia. 1883 Midland Naturalist 4 49 This Puccinia (viz., graminis), then, begins its life in spring as an Œcidium, or cluster-cup, on the leaves of Berberis. 1905 Bismark (N. Dakota) Daily Tribune 14 June 2/3 The stage of the rust growth, known as the aecidium or cluster-cup stage is nearly a full month earlier this year than last season. 1964 Kew Bull. 19 80 Puccinia festucae has still to be collected on Rhum or Eigg, though its aecidia were present on Barra in April 1961. 2004 J. M. Suttie & S. G. Reynolds Fodder Oats xii. 199/2 These infections produce aecidia from which aeciospores arise and then infect the oats. This entry has been updated (OED Third Edition, December 2011; most recently modified version published online December 2021). < n.1751
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