Chaetognathan.

Brit.

/ˌkiːtəɡˈnaθə/,

/ˌkiːtəɡˈneɪθə/,

/kiːˈtɒɡnəθə/, U.S.

/kiˈtɑɡnəθə/

Origin: A borrowing from Latin. Etymons: Latin Chaetognatha, Chaetognathi.

Etymology: < scientific Latin Chaetognatha, alteration of Chaetognathi (R. Leuckart 1854, in Archiv f. Naturgeschichte 20 ii. 334) < ancient Greek χαίτη (see chaeta n.) + scientific Latin -o- -o- connective + ancient Greek γνάθος jaw (see -gnath comb. form) + scientific Latin -a -a suffix². Compare earlier chaetopod adj.

Zoology.

With plural agreement: a small phylum comprising the arrow worms, which are slender, transparent worm-like animals that are common in marine plankton, having fins, and spines on the head for grasping prey. Also: worms of this phylum (collectively or individually); arrow worms.Formerly placed with the nematodes in the group Nemathelminthes.

ΚΠ

1870 G. Rolleston Forms Animal Life Introd. p. cxxxvii The Chaetognatha, an order of marine worms of small size.., have been here ranked with the Nematoidea and Acanthocephali as Nematelminthes.

1892 E. R. Lankester tr. E. Haeckel Hist. Creation (ed. 4) II. 150 Arrow-worms [or] Chætognatha.

a1933 J. A. Thomson Biol. for Everyman (1934) I. ix. 165 There are grappling-hooks and small spines beside the mouth, hence the technical name Chaetognatha, which means ‘bristle-jawed’.

1954 Trans. Royal Soc. Trop. Med. & Hygiene 48 371 Grassi carried out extensive studies on marine metazoa of the order Chaetognatha, of which he described 14 species.

2004 J. W. Valentine On Origin of Phyla x. 376 If the assignment of protoconodonts to Chaetognatha is correct, then protocodonts are unrelated to paraconodonts and conodonts proper.

Derivatives

chaeˈtognathous adj. rare = chaetognath adj.

ΚΠ

1889 Cent. Dict. Chætognathous, pertaining to or having the characters of the Chætognatha.

1937 W. C. Allee & K. P. Schmidt Hesse's Ecol. Animal Geogr. xi. 166 Among the chaetognathous worms, Sagitta hexaptera is very sensitive to fresh water.

This entry has been updated (OED Third Edition, September 2009; most recently modified version published online June 2022).

单词	chaetognatha
释义	Chaetognathan. Brit. /ˌkiːtəɡˈnaθə/, /ˌkiːtəɡˈneɪθə/, /kiːˈtɒɡnəθə/, U.S. /kiˈtɑɡnəθə/ Origin: A borrowing from Latin. Etymons: Latin Chaetognatha, Chaetognathi. Etymology: < scientific Latin Chaetognatha, alteration of Chaetognathi (R. Leuckart 1854, in Archiv f. Naturgeschichte 20 ii. 334) < ancient Greek χαίτη (see chaeta n.) + scientific Latin -o- -o- connective + ancient Greek γνάθος jaw (see -gnath comb. form) + scientific Latin -a -a suffix². Compare earlier chaetopod adj. Zoology. With plural agreement: a small phylum comprising the arrow worms, which are slender, transparent worm-like animals that are common in marine plankton, having fins, and spines on the head for grasping prey. Also: worms of this phylum (collectively or individually); arrow worms.Formerly placed with the nematodes in the group Nemathelminthes. ΚΠ 1870 G. Rolleston Forms Animal Life Introd. p. cxxxvii The Chaetognatha, an order of marine worms of small size.., have been here ranked with the Nematoidea and Acanthocephali as Nematelminthes. 1892 E. R. Lankester tr. E. Haeckel Hist. Creation (ed. 4) II. 150 Arrow-worms [or] Chætognatha. a1933 J. A. Thomson Biol. for Everyman (1934) I. ix. 165 There are grappling-hooks and small spines beside the mouth, hence the technical name Chaetognatha, which means ‘bristle-jawed’. 1954 Trans. Royal Soc. Trop. Med. & Hygiene 48 371 Grassi carried out extensive studies on marine metazoa of the order Chaetognatha, of which he described 14 species. 2004 J. W. Valentine On Origin of Phyla x. 376 If the assignment of protoconodonts to Chaetognatha is correct, then protocodonts are unrelated to paraconodonts and conodonts proper. Derivatives chaeˈtognathous adj. rare = chaetognath adj. ΚΠ 1889 Cent. Dict. Chætognathous, pertaining to or having the characters of the Chætognatha. 1937 W. C. Allee & K. P. Schmidt Hesse's Ecol. Animal Geogr. xi. 166 Among the chaetognathous worms, Sagitta hexaptera is very sensitive to fresh water. This entry has been updated (OED Third Edition, September 2009; most recently modified version published online June 2022). < n.1870
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