opercularadj.n.

Brit.

/ə(ʊ)ˈpəːkjᵿlə/,

/ɒˈpəːkjᵿlə/, U.S.

/oʊˈpərkjələr/

Origin: A borrowing from Latin. Etymon: Latin opercularis.

Etymology: < scientific Latin opercularis (1758 as a specific name) < classical Latin operculum cover, covering, lid (see operculum n.) + -āris -ar suffix¹. Compare French operculaire, noun (1803 in botany, 1836 in zoology) and adjective (1815 in botany).

A. adj.

1. Zoology and Botany. Of, relating to, or of the nature of an operculum; characterized by the presence of an operculum. Also: †designating the smaller of the two valves of a bivalve mollusc when they are unequal in size (obsolete).

ΘΚΠ

the world > animals > animal body > general parts > [adjective] > having a cover or lid

operculate1775

operculated1776

operculiform1822

opercular1830

operculigerous1851

operculiferous1857

operculigenous1882

1830 J. Lindley Introd. Nat. Syst. Bot. 265 Anther terminal, opercular.

1854 S. P. Woodward Man. Mollusca ii. 251 In the extinct genus Radiolites both adductors were attached to large tooth-like processes of the opercular valve.

1875 T. H. Huxley in Encycl. Brit. I. 751/2 The gill apertures are closed by the growing over them of an opercular membrane.

1911 Bot. Gaz. 52 226 Bonpland failed to describe either the operculum or the opercular opening of the fruit.

1939 T. L. Green Pract. Animal Biol. ii. 226 Examine and make a diagram of a transverse section through the head of a 14-mm. tadpole to show the internal gills lying in the opercular cavity.

1997 G. S. Helfman et al. Diversity of Fishes xi. 158/2 Osteichthyans shared numerous characteristics, including the bone series in the opercular and pectoral girdles.

†2. Provided with a lid. Obsolete. rare.

ΘΚΠ

the world > space > relative position > closed or shut condition > [adjective] > closed or shut > having a lid

liddedc900

covered1463

cured1463

operculated1657

opercular1858

1858 Catal. 10th Exhib. Inventions in Jrnl. Soc. Arts 6 App. I. 38/1 Patent Opercular, or Lidded Pipes.

1884 Internat. Health Exhib. Official Catal. 50/1 Sanitary Stoneware of every description, including..opercular pipes.

B. n.

Zoology. The hindmost and largest of the bones of the operculum of a fish. Formerly also: †the splenial bone in the lower jaw of reptiles and some other tetrapods (obsolete). More fully opercular bone.See note at operculum n. 1b.

ΘΚΠ

the world > animals > animal body > general parts > [noun] > lid or cover

coverclea1682

opercular1841

1841 G. E. Mantell in Philos. Trans. (Royal Soc.) 131 132 These bones, as seen in the Iguana..consist of the dentary (a) which supports the teeth; the opercular (b); the complementary (c); [etc.].

1882 Philos. Trans. (Royal Soc.) 173 161 In the face it will not be difficult to seize upon the true meaning of certain ichthyic bones, namely the ‘operculars’.

1947 Jrnl. Animal Ecol. 16 188/2 The use of polarized light often clarified the rings on the operculars, and..the width of these rings could easily be measured.

1997 G. S. Helfman et al. Diversity of Fishes iii. 26/1 The hyomandibula is an inverted L-shaped bone that connects the lower jaw and opercular bones to the neurocranium.

This entry has been updated (OED Third Edition, June 2004; most recently modified version published online June 2022).

单词	opercular
释义	opercularadj.n. Brit. /ə(ʊ)ˈpəːkjᵿlə/, /ɒˈpəːkjᵿlə/, U.S. /oʊˈpərkjələr/ Origin: A borrowing from Latin. Etymon: Latin opercularis. Etymology: < scientific Latin opercularis (1758 as a specific name) < classical Latin operculum cover, covering, lid (see operculum n.) + -āris -ar suffix¹. Compare French operculaire, noun (1803 in botany, 1836 in zoology) and adjective (1815 in botany). A. adj. 1. Zoology and Botany. Of, relating to, or of the nature of an operculum; characterized by the presence of an operculum. Also: †designating the smaller of the two valves of a bivalve mollusc when they are unequal in size (obsolete). ΘΚΠ the world > animals > animal body > general parts > [adjective] > having a cover or lid operculate1775 operculated1776 operculiform1822 opercular1830 operculigerous1851 operculiferous1857 operculigenous1882 1830 J. Lindley Introd. Nat. Syst. Bot. 265 Anther terminal, opercular. 1854 S. P. Woodward Man. Mollusca ii. 251 In the extinct genus Radiolites both adductors were attached to large tooth-like processes of the opercular valve. 1875 T. H. Huxley in Encycl. Brit. I. 751/2 The gill apertures are closed by the growing over them of an opercular membrane. 1911 Bot. Gaz. 52 226 Bonpland failed to describe either the operculum or the opercular opening of the fruit. 1939 T. L. Green Pract. Animal Biol. ii. 226 Examine and make a diagram of a transverse section through the head of a 14-mm. tadpole to show the internal gills lying in the opercular cavity. 1997 G. S. Helfman et al. Diversity of Fishes xi. 158/2 Osteichthyans shared numerous characteristics, including the bone series in the opercular and pectoral girdles. †2. Provided with a lid. Obsolete. rare. ΘΚΠ the world > space > relative position > closed or shut condition > [adjective] > closed or shut > having a lid liddedc900 covered1463 cured1463 operculated1657 opercular1858 1858 Catal. 10th Exhib. Inventions in Jrnl. Soc. Arts 6 App. I. 38/1 Patent Opercular, or Lidded Pipes. 1884 Internat. Health Exhib. Official Catal. 50/1 Sanitary Stoneware of every description, including..opercular pipes. B. n. Zoology. The hindmost and largest of the bones of the operculum of a fish. Formerly also: †the splenial bone in the lower jaw of reptiles and some other tetrapods (obsolete). More fully opercular bone.See note at operculum n. 1b. ΘΚΠ the world > animals > animal body > general parts > [noun] > lid or cover coverclea1682 opercular1841 1841 G. E. Mantell in Philos. Trans. (Royal Soc.) 131 132 These bones, as seen in the Iguana..consist of the dentary (a) which supports the teeth; the opercular (b); the complementary (c); [etc.]. 1882 Philos. Trans. (Royal Soc.) 173 161 In the face it will not be difficult to seize upon the true meaning of certain ichthyic bones, namely the ‘operculars’. 1947 Jrnl. Animal Ecol. 16 188/2 The use of polarized light often clarified the rings on the operculars, and..the width of these rings could easily be measured. 1997 G. S. Helfman et al. Diversity of Fishes iii. 26/1 The hyomandibula is an inverted L-shaped bone that connects the lower jaw and opercular bones to the neurocranium. This entry has been updated (OED Third Edition, June 2004; most recently modified version published online June 2022). < adj.n.1830
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