peristomen.

Brit.

/ˈpɛrᵻstəʊm/, U.S.

/ˈpɛrəˌstoʊm/

Origin: Formed within English, by derivation. Etymons: peri- prefix, -stome comb. form.

Etymology: < peri- prefix + -stome comb. form. In sense 1 after scientific Latin peristoma (J. Hedwig Fund. hist. nat. muscorum frondosorum (1782) ii. iii. 31). Compare French péristome small projections surrounding the mouth of the capsule in mosses (1803), thickness of a mollusc at the site of its aperture (1842), region surrounding the mouth of certain invertebrates (1893). Compare earlier peristoma n.With sense 1 compare slightly earlier peristoma n. 2.

1. Botany. A single or double ring of teeth around the mouth of the capsule of many mosses.

ΘΚΠ

the world > plants > particular plants > moss > [noun] > parts of

moutha1398

fimbria1752

calyptra1753

veil1760

lid1776

apophysis1785

operculum1788

peristoma1792

peristome1799

peristomium1806

hair-point1818

vaginula1818

perigynium1821

vaginule1821

gemma1830

paraphyllium1832

tympanum1832

perigon1857

pseudopodium1861

commissure1863

ocrea1863

cap1864

chaeta1866

struma1866

membranulet1891

pyxis1900

pseudopod1914

annulus-

1799 J. Hull Brit. Flora xxiii. 256 Caps[ule] cylindrical, (peristome) denticulated.

1818 W. J. Hooker & T. Taylor Muscologia Britannica Introd. 4 The absence or presence of the fringe of the Peristome which Hedwig employed to so much advantage.

1889 Hardwicke's Sci.-gossip 25 185/2 Causing the peristome..to open.., disclosing the interior of the capsule with its beautiful golden spores.

1955 G. M. Smith Cryptogamic Bot. (ed. 2) II. v. 125 Shedding of the operculum does not result in an exposure of the spores because the peristome teeth still cover the mouth of the spore sac.

1981 E. V. Watson Brit. Mosses & Liverworts (ed. 3) 210 The orange-red seta.., the ovoid & ellipsoidal capsule, and the well-developed peristome are not matched in any other common British species of Pottia.

2. Zoology.

a. The margin of the aperture of the shell of a mollusc.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Mollusca > [noun] > Testacea (shelled molluscs) > shelled mollusc > shell > part of

auricle1665

heel1673

lip1681

mouth1681

whirl1681

rib1711

antihelix1721

canal1734

columella1755

vesture1755

body whirl1776

fent1776

pillar1776

pillar-lip1776

septum1786

aperture1794

body whorl1807

costa1812

seam1816

spine1822

umbo1822

varix1822

peristome1828

summit1828

nucleus1833

concameration1835

lunula1835

nympha1836

nymph1839

lunule1842

peritreme1848

body chamber1851

axis1866

umbone1867

liration1904

1828 J. Fleming Hist. Brit. Animals 261 The thickened peristome white.

1870 G. Rolleston Forms Animal Life 47 The columella is seen in the angle..; its umbilicus is partly..concealed by the reflection over it of the peristome.

1986 G. Culverwell tr. P. Arduini & G. Teruzzi Macdonald Encycl. Fossils Entry 67 The peristome is olive-shaped: it is sharp in the upper region and ends in a strong crest.

b. Any special structure or set of parts surrounding the mouth or oral opening in various invertebrates, such as echinoderms, coelenterates, and protozoans.

ΘΚΠ

the world > animals > invertebrates > bodies or parts > [noun] > equivalent of the mouth > part surrounding

peristome1875

1875 T. H. Huxley & H. N. Martin Course Elem. Biol. (1877) 93 [Vorticellæ] The prominent everted rim (peristome).

1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 781 [Hydrozoa Acraspeda] The mouth..is situate in the centre of a disc or peristome of great mobility.

1930 H. G. Newth Marshall & Hurst's Junior Course Pract. Zool. (ed. 11) i. 11 [Vorticella] If the irritation be discontinued, the stalk gradually straightens out, the disc and peristome become everted, and the ciliary movement is resumed.

1990 C. Pellant Rocks, Minerals & Fossils 139/1 [Echinodermata] Both bands run from the small circular mouth region (the peristome) on the underside of the test to the anal region (the periproct) on the upper surface.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	peristome
释义	peristomen. Brit. /ˈpɛrᵻstəʊm/, U.S. /ˈpɛrəˌstoʊm/ Origin: Formed within English, by derivation. Etymons: peri- prefix, -stome comb. form. Etymology: < peri- prefix + -stome comb. form. In sense 1 after scientific Latin peristoma (J. Hedwig Fund. hist. nat. muscorum frondosorum (1782) ii. iii. 31). Compare French péristome small projections surrounding the mouth of the capsule in mosses (1803), thickness of a mollusc at the site of its aperture (1842), region surrounding the mouth of certain invertebrates (1893). Compare earlier peristoma n.With sense 1 compare slightly earlier peristoma n. 2. 1. Botany. A single or double ring of teeth around the mouth of the capsule of many mosses. ΘΚΠ the world > plants > particular plants > moss > [noun] > parts of moutha1398 fimbria1752 calyptra1753 veil1760 lid1776 apophysis1785 operculum1788 peristoma1792 peristome1799 peristomium1806 hair-point1818 vaginula1818 perigynium1821 vaginule1821 gemma1830 paraphyllium1832 tympanum1832 perigon1857 pseudopodium1861 commissure1863 ocrea1863 cap1864 chaeta1866 struma1866 membranulet1891 pyxis1900 pseudopod1914 annulus- 1799 J. Hull Brit. Flora xxiii. 256 Caps[ule] cylindrical, (peristome) denticulated. 1818 W. J. Hooker & T. Taylor Muscologia Britannica Introd. 4 The absence or presence of the fringe of the Peristome which Hedwig employed to so much advantage. 1889 Hardwicke's Sci.-gossip 25 185/2 Causing the peristome..to open.., disclosing the interior of the capsule with its beautiful golden spores. 1955 G. M. Smith Cryptogamic Bot. (ed. 2) II. v. 125 Shedding of the operculum does not result in an exposure of the spores because the peristome teeth still cover the mouth of the spore sac. 1981 E. V. Watson Brit. Mosses & Liverworts (ed. 3) 210 The orange-red seta.., the ovoid & ellipsoidal capsule, and the well-developed peristome are not matched in any other common British species of Pottia. 2. Zoology. a. The margin of the aperture of the shell of a mollusc. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Mollusca > [noun] > Testacea (shelled molluscs) > shelled mollusc > shell > part of auricle1665 heel1673 lip1681 mouth1681 whirl1681 rib1711 antihelix1721 canal1734 columella1755 vesture1755 body whirl1776 fent1776 pillar1776 pillar-lip1776 septum1786 aperture1794 body whorl1807 costa1812 seam1816 spine1822 umbo1822 varix1822 peristome1828 summit1828 nucleus1833 concameration1835 lunula1835 nympha1836 nymph1839 lunule1842 peritreme1848 body chamber1851 axis1866 umbone1867 liration1904 1828 J. Fleming Hist. Brit. Animals 261 The thickened peristome white. 1870 G. Rolleston Forms Animal Life 47 The columella is seen in the angle..; its umbilicus is partly..concealed by the reflection over it of the peristome. 1986 G. Culverwell tr. P. Arduini & G. Teruzzi Macdonald Encycl. Fossils Entry 67 The peristome is olive-shaped: it is sharp in the upper region and ends in a strong crest. b. Any special structure or set of parts surrounding the mouth or oral opening in various invertebrates, such as echinoderms, coelenterates, and protozoans. ΘΚΠ the world > animals > invertebrates > bodies or parts > [noun] > equivalent of the mouth > part surrounding peristome1875 1875 T. H. Huxley & H. N. Martin Course Elem. Biol. (1877) 93 [Vorticellæ] The prominent everted rim (peristome). 1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 781 [Hydrozoa Acraspeda] The mouth..is situate in the centre of a disc or peristome of great mobility. 1930 H. G. Newth Marshall & Hurst's Junior Course Pract. Zool. (ed. 11) i. 11 [Vorticella] If the irritation be discontinued, the stalk gradually straightens out, the disc and peristome become everted, and the ciliary movement is resumed. 1990 C. Pellant Rocks, Minerals & Fossils 139/1 [Echinodermata] Both bands run from the small circular mouth region (the peristome) on the underside of the test to the anal region (the periproct) on the upper surface. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < n.1799
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