acervulusn.

Brit.

/əˈsəːvjᵿləs/, U.S.

/əˈsərvjələs/

Inflections: Plural acervuli.

Origin: A borrowing from Latin. Etymon: Latin acervulus.

Etymology: Originally < post-classical Latin acervulus (in acervulus cerebri ( N. Lisignolo Resp. dissertatio inauguralis anatomica de lapillis vel prope vel intra glandulam pinealem sitis, sive de acervulo cerebri (1785)) < acervulus small heap or collection (1686 or earlier; < classical Latin acervus heap, of unknown origin + -ulus -ulus suffix) + classical Latin cerebrī , genitive singular of cerebrum cerebrum n.). In sense 2 < scientific Latin acervulus (1810 or earlier), specific use of post-classical Latin acervulus.

1. Anatomy. More fully acervulus cerebri: a collection of small calcified concretions situated within or near the pineal body; = brain sand n. at brain n. Compounds 2. In later use also: an individual concretion of this kind.

ΘΚΠ

the world > life > the body > nervous system > cerebrospinal axis > brain > [noun] > substances of

medulla?a1425

pith1594

acervulus cerebri1791

brain sand1831

oleophosphoric acid1839

wetware1963

1791 W. Vaughan Expos. Princ. Anat. & Physiol. II. 46 Near the base of this gland, or within it, from the fourteenth year, is a little heap of stones..; the larger stones are generally in the middle surrounded by the smaller, so that it is properly enough called Acervulus.

1800 A. Fyfe Compend. Anat. Human Body for Use Students II. iv. 22 Near, or in the Substance of the Pineal Gland, small Calcareous Concretions are sometimes found, called, by Soemmerring, Acervulus Cerebri, from their being generally found collected in a heap.

1839 Brit. & Foreign Med. Rev. 7 505 If the globules of the acervulus be subjected to the action of muriatic acid, carbonic acid is evolved.

1882 Quain's Elements Anat. (ed. 9) II. 327 The follicles [of the pineal]..often contain..much gritty calcareous matter (acervulus cerebri, brain sand), composed of microscopic particles.

1970 T. S. Leeson & C. R. Leeson Histology (ed. 2) xvii. 414/1 Acervuli (brain sand or corpora arenacea) are concretions which appear mainly in the capsule and septa.

2005 Jrnl. Neurol. Sci. 238 Suppl. S495/1 Histological methods..were used to study epiphysis morphology and distribution of the brain sand (corpora arenacea, acervulus).

2. Mycology. In certain fungi pathogenic to plants: a flat, typically round mass of hyphae bearing conidiophores which is produced below the epidermis of the host plant.

ΘΚΠ

the world > plants > particular plants > fungi > [noun] > parts of > cells and tissue

chive1721

spawn1731

mushroom spawn1753

volva1753

ring1777

veil1777

curtain1796

wrapper1796

fungin1813

subiculum1821

cortina1832

velum1832

mycelium1836

uterus1836

gleba1847

hypostroma1855

sulcus1856

rhizopod1859

tigellule1860

trichophore1860

hypha1866

hypothecium1866

rhizopodium1866

annulus1871

capillitium1871

acervulus1872

weft1875

capsule1883

clamp-connection1887

periphysis1887

chain gemma1893

trumpet hypha1900

metula1915

monokaryon1935

1872 W. A. Leighton Lichen-flora (ed. 2) p. xvi Acervuli, little heaps or clusters.

1898 Bot. Gaz. 26 82 On the margin of the spots the acervuli become confluent, often forming a close ring surrounding the less gregarious acervuli of the central portion.

1925 C. Chupp Man. Veg. Garden Dis. ii. 17 The parasite, Colleotrichum lindemuthianum..is one of a large group of fungi characterized by its shallow open fruit-body known as an acervulus.

1947 C. E. Skinner et al. Henrici's Molds, Yeasts, & Actinomycetes (ed. 2) v. 96 The third order, the Moniliales,..contains the remaining forms, whose conidiophores are produced neither in pycnidia nor upon acervuli.

1998 L. Margulis & K. V. Schwartz Five Kingdoms (ed. 3) iv. 363/2 These mats, called acervuli, can often be seen as flat, disc-shaped cushions on host plants.

This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021).

单词	acervulus
释义	acervulusn. Brit. /əˈsəːvjᵿləs/, U.S. /əˈsərvjələs/ Inflections: Plural acervuli. Origin: A borrowing from Latin. Etymon: Latin acervulus. Etymology: Originally < post-classical Latin acervulus (in acervulus cerebri ( N. Lisignolo Resp. dissertatio inauguralis anatomica de lapillis vel prope vel intra glandulam pinealem sitis, sive de acervulo cerebri (1785)) < acervulus small heap or collection (1686 or earlier; < classical Latin acervus heap, of unknown origin + -ulus -ulus suffix) + classical Latin cerebrī , genitive singular of cerebrum cerebrum n.). In sense 2 < scientific Latin acervulus (1810 or earlier), specific use of post-classical Latin acervulus. 1. Anatomy. More fully acervulus cerebri: a collection of small calcified concretions situated within or near the pineal body; = brain sand n. at brain n. Compounds 2. In later use also: an individual concretion of this kind. ΘΚΠ the world > life > the body > nervous system > cerebrospinal axis > brain > [noun] > substances of medulla?a1425 pith1594 acervulus cerebri1791 brain sand1831 oleophosphoric acid1839 wetware1963 1791 W. Vaughan Expos. Princ. Anat. & Physiol. II. 46 Near the base of this gland, or within it, from the fourteenth year, is a little heap of stones..; the larger stones are generally in the middle surrounded by the smaller, so that it is properly enough called Acervulus. 1800 A. Fyfe Compend. Anat. Human Body for Use Students II. iv. 22 Near, or in the Substance of the Pineal Gland, small Calcareous Concretions are sometimes found, called, by Soemmerring, Acervulus Cerebri, from their being generally found collected in a heap. 1839 Brit. & Foreign Med. Rev. 7 505 If the globules of the acervulus be subjected to the action of muriatic acid, carbonic acid is evolved. 1882 Quain's Elements Anat. (ed. 9) II. 327 The follicles [of the pineal]..often contain..much gritty calcareous matter (acervulus cerebri, brain sand), composed of microscopic particles. 1970 T. S. Leeson & C. R. Leeson Histology (ed. 2) xvii. 414/1 Acervuli (brain sand or corpora arenacea) are concretions which appear mainly in the capsule and septa. 2005 Jrnl. Neurol. Sci. 238 Suppl. S495/1 Histological methods..were used to study epiphysis morphology and distribution of the brain sand (corpora arenacea, acervulus). 2. Mycology. In certain fungi pathogenic to plants: a flat, typically round mass of hyphae bearing conidiophores which is produced below the epidermis of the host plant. ΘΚΠ the world > plants > particular plants > fungi > [noun] > parts of > cells and tissue chive1721 spawn1731 mushroom spawn1753 volva1753 ring1777 veil1777 curtain1796 wrapper1796 fungin1813 subiculum1821 cortina1832 velum1832 mycelium1836 uterus1836 gleba1847 hypostroma1855 sulcus1856 rhizopod1859 tigellule1860 trichophore1860 hypha1866 hypothecium1866 rhizopodium1866 annulus1871 capillitium1871 acervulus1872 weft1875 capsule1883 clamp-connection1887 periphysis1887 chain gemma1893 trumpet hypha1900 metula1915 monokaryon1935 1872 W. A. Leighton Lichen-flora (ed. 2) p. xvi Acervuli, little heaps or clusters. 1898 Bot. Gaz. 26 82 On the margin of the spots the acervuli become confluent, often forming a close ring surrounding the less gregarious acervuli of the central portion. 1925 C. Chupp Man. Veg. Garden Dis. ii. 17 The parasite, Colleotrichum lindemuthianum..is one of a large group of fungi characterized by its shallow open fruit-body known as an acervulus. 1947 C. E. Skinner et al. Henrici's Molds, Yeasts, & Actinomycetes (ed. 2) v. 96 The third order, the Moniliales,..contains the remaining forms, whose conidiophores are produced neither in pycnidia nor upon acervuli. 1998 L. Margulis & K. V. Schwartz Five Kingdoms (ed. 3) iv. 363/2 These mats, called acervuli, can often be seen as flat, disc-shaped cushions on host plants. This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021). < n.1791
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