unionidn.adj.

Brit.

/ˈjuːnɪənɪd/, U.S.

/ˈjunjəˌnɪd/

Origin: A borrowing from Latin; modelled on a Latin lexical item. Etymon: Latin Unionidae.

Etymology: < scientific Latin Unionidae, family name (1825 or earlier) < Unio unio n. + -idae (see -id suffix³), with insertion of -n- after classical Latin ūniōn-, ūniō, etymon of the first element. Compare unionoid adj. and n.

Zoology.

A. n.

A bivalve mollusc of the family Unionidae; a unio.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Pelecypoda or Conchifera > [noun] > section Asiphonida > family Unionidae > member of

musseleOE

palour1589

pearl mussel1607

hena1613

horse-mussel1626

clam1672

clamp1672

pearl shell1781

glam1797

naiad1829

naid1854

unionid1861

zebra mussel1866

hackleback1899

maple leaf1908

monkey-face1936

1861 P. P. Carpenter in Rep. Smithsonian Inst. 1860 263 The extreme forms of the Unionids are widely removed from each other.

1927 Ecology 8 293 The same little hand dredge has been brought up from the bottom of the Illinois River with..an occasional unionid, in the bag.

2007 D. J. Allan & M. M. Castillo Stream Ecol. (ed. 2) viii. 176/2 These unionids were probably assimilating the microbial and algal components of the suspended or benthic organic matter.

B. adj.

Designating molluscs of the family Unionidae; relating to or characteristic of this family.

ΚΠ

1890 W. H. Dall Trans. Wagner Free Inst. Sci. 3 523 No Mutelid, known to be such, has the Unionid type of hinge.

1967 Jrnl. Parasitol. 67 226 The present study began with the discovery of metacercariae in the edge of the mantle of unionid bivalves collected from the Tippecanoe River, Indiana.

2005 P. J. Currie & E. B. Koppelhus Dinosaur Provincial Park viii. 145 (caption) Articulated unionid shells, many in life position in channel lag..below a thin clay bed.

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

单词	unionid
释义	unionidn.adj. Brit. /ˈjuːnɪənɪd/, U.S. /ˈjunjəˌnɪd/ Origin: A borrowing from Latin; modelled on a Latin lexical item. Etymon: Latin Unionidae. Etymology: < scientific Latin Unionidae, family name (1825 or earlier) < Unio unio n. + -idae (see -id suffix³), with insertion of -n- after classical Latin ūniōn-, ūniō, etymon of the first element. Compare unionoid adj. and n. Zoology. A. n. A bivalve mollusc of the family Unionidae; a unio. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Pelecypoda or Conchifera > [noun] > section Asiphonida > family Unionidae > member of musseleOE palour1589 pearl mussel1607 hena1613 horse-mussel1626 clam1672 clamp1672 pearl shell1781 glam1797 naiad1829 naid1854 unionid1861 zebra mussel1866 hackleback1899 maple leaf1908 monkey-face1936 1861 P. P. Carpenter in Rep. Smithsonian Inst. 1860 263 The extreme forms of the Unionids are widely removed from each other. 1927 Ecology 8 293 The same little hand dredge has been brought up from the bottom of the Illinois River with..an occasional unionid, in the bag. 2007 D. J. Allan & M. M. Castillo Stream Ecol. (ed. 2) viii. 176/2 These unionids were probably assimilating the microbial and algal components of the suspended or benthic organic matter. B. adj. Designating molluscs of the family Unionidae; relating to or characteristic of this family. ΚΠ 1890 W. H. Dall Trans. Wagner Free Inst. Sci. 3 523 No Mutelid, known to be such, has the Unionid type of hinge. 1967 Jrnl. Parasitol. 67 226 The present study began with the discovery of metacercariae in the edge of the mantle of unionid bivalves collected from the Tippecanoe River, Indiana. 2005 P. J. Currie & E. B. Koppelhus Dinosaur Provincial Park viii. 145 (caption) Articulated unionid shells, many in life position in channel lag..below a thin clay bed. This entry has been updated (OED Third Edition, September 2015; most recently modified version published online March 2022). < n.adj.1861
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