agnathousadj.

Brit.

/aɡˈneɪθəs/, U.S.

/ˌæɡˈneɪθəs/

Origin: Formed within English, by derivation. Etymons: a- prefix⁶, -gnathous comb. form.

Etymology: < a- prefix⁶ + -gnathous comb. form.In quot. 1870 rendering French agnathes, plural adjective (1870 in the source summarized). N.E.D. (1884) gives the pronunciation as (æ·gnăþəs) /ˈæɡnəθəs/.

Zoology and Medicine.

Of a group of vertebrate or invertebrate animals: characterized by the absence of jaws, jawless. Also: having no lower jaw (mandible), esp. as a result of a congenital malformation.

ΚΠ

1870 Sci. Opinion 19 Jan. 79/2 The present position of the family—viz., with the Agnathous group of Geophilous mollusks—cannot be maintained.

1874 Cal. Royal Coll. Surgeons 309 Skull of an agnathous pig.

1894 J. W. Ballantyne Teratologia I. 135 Fœtuses with absence of the maxillæ..are in modern terminology called agnathous.

1910 Brit. Med. Jrnl. 15 Oct. 1159 (title) A cyclops and agnathous lamb.

1919 Ann. N.Y. Acad. Sci. 28 124 These agnathous forms developed their dermal plates just as the gnathostomes did.

1960 Jrnl. Paleontol. 34 510/2 Already in Lower and Middle Ordovician highly evolved bony agnathous ‘fishes’ existed.

2009 D. Dye War Paths, Peace Paths 151 Perhaps the most distinctive iconographic trophy motif was the severed agnathous human head.

This entry has been updated (OED Third Edition, September 2012; most recently modified version published online March 2022).

单词	agnathous
释义	agnathousadj. Brit. /aɡˈneɪθəs/, U.S. /ˌæɡˈneɪθəs/ Origin: Formed within English, by derivation. Etymons: a- prefix⁶, -gnathous comb. form. Etymology: < a- prefix⁶ + -gnathous comb. form.In quot. 1870 rendering French agnathes, plural adjective (1870 in the source summarized). N.E.D. (1884) gives the pronunciation as (æ·gnăþəs) /ˈæɡnəθəs/. Zoology and Medicine. Of a group of vertebrate or invertebrate animals: characterized by the absence of jaws, jawless. Also: having no lower jaw (mandible), esp. as a result of a congenital malformation. ΚΠ 1870 Sci. Opinion 19 Jan. 79/2 The present position of the family—viz., with the Agnathous group of Geophilous mollusks—cannot be maintained. 1874 Cal. Royal Coll. Surgeons 309 Skull of an agnathous pig. 1894 J. W. Ballantyne Teratologia I. 135 Fœtuses with absence of the maxillæ..are in modern terminology called agnathous. 1910 Brit. Med. Jrnl. 15 Oct. 1159 (title) A cyclops and agnathous lamb. 1919 Ann. N.Y. Acad. Sci. 28 124 These agnathous forms developed their dermal plates just as the gnathostomes did. 1960 Jrnl. Paleontol. 34 510/2 Already in Lower and Middle Ordovician highly evolved bony agnathous ‘fishes’ existed. 2009 D. Dye War Paths, Peace Paths 151 Perhaps the most distinctive iconographic trophy motif was the severed agnathous human head. This entry has been updated (OED Third Edition, September 2012; most recently modified version published online March 2022). < adj.1870
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