peristomiumn.

Brit.

/ˌpɛrᵻˈstəʊmɪəm/, U.S.

/ˌpɛrəˈstoʊmiəm/

Origin: A borrowing from Greek, combined with an English element. Etymons: peri- prefix, Greek στόμα, Latin -ium.

Etymology: < peri- prefix + ancient Greek στόμα mouth (see stoma n.) + classical Latin -ium (see -y suffix⁴). In sense 1 after scientific Latin peristomium (F. Ehrhart Beiträge zur Naturkunde (1787) I. 17; < peristoma peristome n. + -ium (see -y suffix⁴, after post-classical Latin pericarpium pericarpium n.², etc.). Compare earlier peristoma n., peristome n.Compare Hellenistic Greek περιστόμιον mouth of a vessel, etc., use as noun of περιστόμιος, adjective, round a mouth or aperture.

†1. Botany. = peristome n. 1. Obsolete.

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-

1800 J. Hull Elements Bot. I. 73 Terms and Definitions used by Hedwig... Peristome, peristomïum s[ive] peristoma, the apparatus observed at the mouth of the case, when the lid falls off.]

1806 J. E. Smith Eng. Bot. XXII. 1583 Gathered on trees near Ripon... The account of the peristomium was communicated by a very excellent friend.

1830 J. Lindley Introd. Nat. Syst. Bot. 320 One or more rows of cellular rigid processes, called collectively the peristomium, and separately teeth.

1875 Amer. Cycl. XI. 864/2 (caption) The same with Operculum removed, exposing the Peristomium and Epiphragm.

2. Zoology. The first true somite of certain annelids (such as earthworms), bearing the mouth.

ΚΠ

1877 T. H. Huxley Man. Anat. Invertebrated Animals v. 232 [Chætopoda] The first somite, which contains the mouth, is the peristomium.

1896 J. W. Kirkaldy & E. C. Pollard tr. J. E. V. Boas Text Bk. Zool. 169 [Chætopoda] The second segment, the peristomium, which usually bears the mouth,..is provided with a rudimentary parapodium on each side.

1961 J. L. Cloudsley-Thompson & J. Sankey Land Invertebr. iii. 40 The segment behind the mouth is counted as the first or peristomium and bears a head-lobe or prostomium.

1995 C. Nielsen Animal Evol. xvii. 127 Polychaetes... The head region consists of a preoral region, the prostomium, which is definitely presegmental, and a perioral region, the peristomium.

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

单词	peristomium
释义	peristomiumn. Brit. /ˌpɛrᵻˈstəʊmɪəm/, U.S. /ˌpɛrəˈstoʊmiəm/ Origin: A borrowing from Greek, combined with an English element. Etymons: peri- prefix, Greek στόμα, Latin -ium. Etymology: < peri- prefix + ancient Greek στόμα mouth (see stoma n.) + classical Latin -ium (see -y suffix⁴). In sense 1 after scientific Latin peristomium (F. Ehrhart Beiträge zur Naturkunde (1787) I. 17; < peristoma peristome n. + -ium (see -y suffix⁴, after post-classical Latin pericarpium pericarpium n.², etc.). Compare earlier peristoma n., peristome n.Compare Hellenistic Greek περιστόμιον mouth of a vessel, etc., use as noun of περιστόμιος, adjective, round a mouth or aperture. †1. Botany. = peristome n. 1. Obsolete. 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- 1800 J. Hull Elements Bot. I. 73 Terms and Definitions used by Hedwig... Peristome, peristomïum s[ive] peristoma, the apparatus observed at the mouth of the case, when the lid falls off.] 1806 J. E. Smith Eng. Bot. XXII. 1583 Gathered on trees near Ripon... The account of the peristomium was communicated by a very excellent friend. 1830 J. Lindley Introd. Nat. Syst. Bot. 320 One or more rows of cellular rigid processes, called collectively the peristomium, and separately teeth. 1875 Amer. Cycl. XI. 864/2 (caption) The same with Operculum removed, exposing the Peristomium and Epiphragm. 2. Zoology. The first true somite of certain annelids (such as earthworms), bearing the mouth. ΚΠ 1877 T. H. Huxley Man. Anat. Invertebrated Animals v. 232 [Chætopoda] The first somite, which contains the mouth, is the peristomium. 1896 J. W. Kirkaldy & E. C. Pollard tr. J. E. V. Boas Text Bk. Zool. 169 [Chætopoda] The second segment, the peristomium, which usually bears the mouth,..is provided with a rudimentary parapodium on each side. 1961 J. L. Cloudsley-Thompson & J. Sankey Land Invertebr. iii. 40 The segment behind the mouth is counted as the first or peristomium and bears a head-lobe or prostomium. 1995 C. Nielsen Animal Evol. xvii. 127 Polychaetes... The head region consists of a preoral region, the prostomium, which is definitely presegmental, and a perioral region, the peristomium. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < n.1806
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