unioidadj.n.

Brit.

/ˈjuːnɪɔɪd/, U.S.

/ˈjuniˌɔɪd/

Origin: Formed within English, by derivation. Etymons: unio n., -oid suffix.

Etymology: < unio n. + -oid suffix. Compare unionoid adj.

Zoology. rare.

A. adj.

Resembling or shaped like (that of) a unio.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Pelecypoda or Conchifera > [adjective] > of, belonging to, or resembling the Unionidae

unioniform1829

hippurite1831

unioid1861

unionoid1879

1861 P. P. Carpenter in Rep. Smithsonian Inst. 1860 268 Shells, with two Unioid teeth in each valve.

1909 A. W. Grabau & H. W. Shimer N. Amer. Index Fossils: Invertebr. I. 371 Greatest length of shell parallel with the long, arcuate hinge line, unioid.

2006 J. I. Kirkland in J. R. Foster & L. Lucas Paleontol. & Geol. Upper Jurassic Morrison 86 Close-up showing scatter of dinosaur bone fragments and unioid shell fragments at Ceratosaurus Pond Site.

B. n.

= unionoid n.

ΚΠ

1987 Mem. Palaeontol. Soc. No. 22 1 The unioid Cardinioides josephus.

1996 G. M. McGhee Late Devonian Mass Extinction 84 Species of the oldest freshwater bivalve genus, the unioid Archanodon, are well known from Frasnian strata in New York State.

This entry has been updated (OED Third Edition, September 2015; most recently modified version published online March 2022).

单词	unioid
释义	unioidadj.n. Brit. /ˈjuːnɪɔɪd/, U.S. /ˈjuniˌɔɪd/ Origin: Formed within English, by derivation. Etymons: unio n., -oid suffix. Etymology: < unio n. + -oid suffix. Compare unionoid adj. Zoology. rare. A. adj. Resembling or shaped like (that of) a unio. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Pelecypoda or Conchifera > [adjective] > of, belonging to, or resembling the Unionidae unioniform1829 hippurite1831 unioid1861 unionoid1879 1861 P. P. Carpenter in Rep. Smithsonian Inst. 1860 268 Shells, with two Unioid teeth in each valve. 1909 A. W. Grabau & H. W. Shimer N. Amer. Index Fossils: Invertebr. I. 371 Greatest length of shell parallel with the long, arcuate hinge line, unioid. 2006 J. I. Kirkland in J. R. Foster & L. Lucas Paleontol. & Geol. Upper Jurassic Morrison 86 Close-up showing scatter of dinosaur bone fragments and unioid shell fragments at Ceratosaurus Pond Site. B. n. = unionoid n. ΚΠ 1987 Mem. Palaeontol. Soc. No. 22 1 The unioid Cardinioides josephus. 1996 G. M. McGhee Late Devonian Mass Extinction 84 Species of the oldest freshwater bivalve genus, the unioid Archanodon, are well known from Frasnian strata in New York State. This entry has been updated (OED Third Edition, September 2015; most recently modified version published online March 2022). < adj.n.1861
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