radiolariann.adj.

Brit.

/ˌreɪdɪə(ʊ)ˈlɛːrɪən/, U.S.

/ˌreɪdiəˈlɛriən/,

/ˌreɪdioʊˈlɛriən/

Origin: A borrowing from Latin, combined with an English element. Etymons: Latin Radiolaria , -an suffix.

Etymology: < scientific Latin Radiolaria Radiolaria n. + -an suffix. Compare slightly earlier Radiolaria n.

Zoology and Palaeontology.

A. n.

A protozoan of any of several classes of the phylum (or superclass) Actinopoda, comprising planktonic marine organisms that have slender radiating axopodia and usually lattice-like siliceous skeletons with projecting spines, the remains of which form substantial recent and fossil marine deposits.The ‘freshwater radiolarians’ of some 19th-cent. authors are now classified as heliozoans. See Radiolaria n.

ΘΚΠ

the world > animals > invertebrates > protozoa > class Sarcodina > order Radiolaria > [noun] > member of

radiolarian1869

1869 Nature 16 Dec. 189/1 Many of these new fresh-water Radiolarians..carry siliceous spicules.

1881 K. Semper Animal Life iii. 74 These yellow or sometimes green cells occur in many fresh-water Radiolarians.

a1933 J. A. Thomson Biol. for Everyman (1934) I. iii. 51 Most Radiolarians have as partners numerous unicellular plants belonging to the class of Algae.

1958 J. E. Morton Molluscs 219 The stomach is filled with small particles of ooze, especially rich in radiolarians.

1973 Sci. Amer. Nov. 102/2 Planktonic protozoans and algae such as radiolarians, diatoms, foraminifera and coccoliths that inhabit the upper 400 meters of the oceans.

1995 New Scientist 2 Dec. 42/1 Marine organisms such as radiolarians, diatoms and coccolithophores make themselves delicate shells out of silica or calcium carbonate with exquisite, infinitely varied designs.

B. adj.

1. Of or relating to a radiolarian or radiolarians.

ΘΚΠ

the world > animals > invertebrates > protozoa > class Sarcodina > order Radiolaria > [adjective]

radiolarian1869

1869 Amer. Naturalist 3 430 From this mass of sarcode, constituting the whole mass of the animal proper of the Radiolarian organism, are protruded filaments..named pseudopodia.

1876 Proc. Royal Soc. 1875–6 24 474 A more careful examination..will usually reveal a Radiolarian skeleton.

1917 D. W. Thompson On Growth & Form i. 2 When he sees in a snail, or nautilus, or tiny foraminiferal or radiolarian shell, a close approach to the perfect sphere or spiral, he is prone of old habit to believe that it is after all something more than a spiral or a sphere.

1979 D. L. Dineley Fossils iii. 70 ‘Siliceous ooze’ includes fine sediments with diatom cases or radiolarian tests.

1997 Micropalaeontology 43 333 A well-preserved radiolarian fauna from the Gogo Formation, Western Australia, has made it possible to clarify the relation of the shell wall and internal structure.

2. Of rock, deposits, etc.: characterized by or formed largely from the tests of radiolarians.

ΚΠ

1876 Proc. Royal Soc. 1875–6 24 518 When any of these have appeared to make up considerably more than one half of the specimen under examination, it has been called..a Globigerina, Radiolarian, or Diatom ooze.

1889 Q. Jrnl. Geol. Soc. Nov. 646 The Radiolarian deposits include a somewhat variable series of marls.

1940 F. F. Grout Kemp's Handbk. Rocks (ed. 6) viii. 155 Less common are..bentonitic clays, diatomaceous and radiolarian clays, and tuffaceous clays.

1973 Nature 20 July 145/2 The deep water Alpine Triassic is represented by cherty, micritic, radiolarian limestones with thin-shelled pelecypods.

1986 Micropaleontology 32 116/2 Sethocapsa pseudouterculus commonly occurs in the upper Tithonian radiolarian beds.

Compounds

radiolarian chert n. Geology a cryptocrystalline type of radiolarite; (more generally) = radiolarite n.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > other siliceous

radiolarian chert1890

silcrete1902

radiolarite1910

1890 Geol. Mag. 7 144 (heading) Radiolarian chert in the Ballantrae series.

1913 F. H. Hatch & R. H. Rastall Petrol. Sedimentary Rocks ii. iii. 233 An interesting example of the metamorphism of a nearly pure siliceous rock is found in the Galloway district, where certain radiolarian cherts of Arenig age are altered by the Loch Doon granite.

1995 Jrnl. Royal Soc. N.Z. 25 99 Lava erupted on the outer shelf or upper slope provided a temporary barrier against terrigenous sedimentation, enabling radiolarian chert to be deposited on the seaward (protected) side.

radiolarian earth n. Geology unconsolidated siliceous rock formed largely from the tests of radiolarians.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > earth or soil > kind of earth or soil > [noun] > organic soil > radiolarian earth

radiolarian earth1889

1889 J. B. Harrison & A. J. J. Browne in Nature 14 Feb. 367/2 (heading) Origin of the radiolarian earth of Barbados.

1913 F. H. Hatch & R. H. Rastall Petrol. Sedimentary Rocks i. iv. 143 One of the most notable instances of the abundant presence of this division of the Protozoa is afforded by the so-called Radiolarian earths of Barbados.

1985 Sedimentary Geol. 42 219 Barbados consists of a basal complex structurally overlain by nappes composed mostly of calcareous radiolarian earth.

radiolarian ooze n. Oceanography a siliceous marine sediment rich in the tests of radiolarians.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > sediment or alluvium > [noun] > marine with organic remains

ooze1858

Globigerina ooze1862

Globigerina mud1868

radiolarian ooze1876

sapropel1907

1876 G. Campbell Log Lett. from Challenger ix. 439 Radiolarian ooze—met with only in the western and middle Pacific.

1926 W. H. Twenhofel Treat. Sedimentation v. 377 Radiolarian ooze is confined to the Pacific and Indian oceans.

1997 Marine Micropalaeontol. 30 171 Intense oceanic circulation apparently was renewed..as indicated by..accumulation of carbonate-free radiolarian ooze in the Karamba Formation.

This entry has been updated (OED Third Edition, June 2008; most recently modified version published online June 2022).

单词	radiolarian
释义	radiolariann.adj. Brit. /ˌreɪdɪə(ʊ)ˈlɛːrɪən/, U.S. /ˌreɪdiəˈlɛriən/, /ˌreɪdioʊˈlɛriən/ Origin: A borrowing from Latin, combined with an English element. Etymons: Latin Radiolaria , -an suffix. Etymology: < scientific Latin Radiolaria Radiolaria n. + -an suffix. Compare slightly earlier Radiolaria n. Zoology and Palaeontology. A. n. A protozoan of any of several classes of the phylum (or superclass) Actinopoda, comprising planktonic marine organisms that have slender radiating axopodia and usually lattice-like siliceous skeletons with projecting spines, the remains of which form substantial recent and fossil marine deposits.The ‘freshwater radiolarians’ of some 19th-cent. authors are now classified as heliozoans. See Radiolaria n. ΘΚΠ the world > animals > invertebrates > protozoa > class Sarcodina > order Radiolaria > [noun] > member of radiolarian1869 1869 Nature 16 Dec. 189/1 Many of these new fresh-water Radiolarians..carry siliceous spicules. 1881 K. Semper Animal Life iii. 74 These yellow or sometimes green cells occur in many fresh-water Radiolarians. a1933 J. A. Thomson Biol. for Everyman (1934) I. iii. 51 Most Radiolarians have as partners numerous unicellular plants belonging to the class of Algae. 1958 J. E. Morton Molluscs 219 The stomach is filled with small particles of ooze, especially rich in radiolarians. 1973 Sci. Amer. Nov. 102/2 Planktonic protozoans and algae such as radiolarians, diatoms, foraminifera and coccoliths that inhabit the upper 400 meters of the oceans. 1995 New Scientist 2 Dec. 42/1 Marine organisms such as radiolarians, diatoms and coccolithophores make themselves delicate shells out of silica or calcium carbonate with exquisite, infinitely varied designs. B. adj. 1. Of or relating to a radiolarian or radiolarians. ΘΚΠ the world > animals > invertebrates > protozoa > class Sarcodina > order Radiolaria > [adjective] radiolarian1869 1869 Amer. Naturalist 3 430 From this mass of sarcode, constituting the whole mass of the animal proper of the Radiolarian organism, are protruded filaments..named pseudopodia. 1876 Proc. Royal Soc. 1875–6 24 474 A more careful examination..will usually reveal a Radiolarian skeleton. 1917 D. W. Thompson On Growth & Form i. 2 When he sees in a snail, or nautilus, or tiny foraminiferal or radiolarian shell, a close approach to the perfect sphere or spiral, he is prone of old habit to believe that it is after all something more than a spiral or a sphere. 1979 D. L. Dineley Fossils iii. 70 ‘Siliceous ooze’ includes fine sediments with diatom cases or radiolarian tests. 1997 Micropalaeontology 43 333 A well-preserved radiolarian fauna from the Gogo Formation, Western Australia, has made it possible to clarify the relation of the shell wall and internal structure. 2. Of rock, deposits, etc.: characterized by or formed largely from the tests of radiolarians. ΚΠ 1876 Proc. Royal Soc. 1875–6 24 518 When any of these have appeared to make up considerably more than one half of the specimen under examination, it has been called..a Globigerina, Radiolarian, or Diatom ooze. 1889 Q. Jrnl. Geol. Soc. Nov. 646 The Radiolarian deposits include a somewhat variable series of marls. 1940 F. F. Grout Kemp's Handbk. Rocks (ed. 6) viii. 155 Less common are..bentonitic clays, diatomaceous and radiolarian clays, and tuffaceous clays. 1973 Nature 20 July 145/2 The deep water Alpine Triassic is represented by cherty, micritic, radiolarian limestones with thin-shelled pelecypods. 1986 Micropaleontology 32 116/2 Sethocapsa pseudouterculus commonly occurs in the upper Tithonian radiolarian beds. Compounds radiolarian chert n. Geology a cryptocrystalline type of radiolarite; (more generally) = radiolarite n. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > other siliceous radiolarian chert1890 silcrete1902 radiolarite1910 1890 Geol. Mag. 7 144 (heading) Radiolarian chert in the Ballantrae series. 1913 F. H. Hatch & R. H. Rastall Petrol. Sedimentary Rocks ii. iii. 233 An interesting example of the metamorphism of a nearly pure siliceous rock is found in the Galloway district, where certain radiolarian cherts of Arenig age are altered by the Loch Doon granite. 1995 Jrnl. Royal Soc. N.Z. 25 99 Lava erupted on the outer shelf or upper slope provided a temporary barrier against terrigenous sedimentation, enabling radiolarian chert to be deposited on the seaward (protected) side. radiolarian earth n. Geology unconsolidated siliceous rock formed largely from the tests of radiolarians. ΘΚΠ the world > the earth > structure of the earth > constituent materials > earth or soil > kind of earth or soil > [noun] > organic soil > radiolarian earth radiolarian earth1889 1889 J. B. Harrison & A. J. J. Browne in Nature 14 Feb. 367/2 (heading) Origin of the radiolarian earth of Barbados. 1913 F. H. Hatch & R. H. Rastall Petrol. Sedimentary Rocks i. iv. 143 One of the most notable instances of the abundant presence of this division of the Protozoa is afforded by the so-called Radiolarian earths of Barbados. 1985 Sedimentary Geol. 42 219 Barbados consists of a basal complex structurally overlain by nappes composed mostly of calcareous radiolarian earth. radiolarian ooze n. Oceanography a siliceous marine sediment rich in the tests of radiolarians. ΘΚΠ the world > the earth > structure of the earth > constituent materials > sediment or alluvium > [noun] > marine with organic remains ooze1858 Globigerina ooze1862 Globigerina mud1868 radiolarian ooze1876 sapropel1907 1876 G. Campbell Log Lett. from Challenger ix. 439 Radiolarian ooze—met with only in the western and middle Pacific. 1926 W. H. Twenhofel Treat. Sedimentation v. 377 Radiolarian ooze is confined to the Pacific and Indian oceans. 1997 Marine Micropalaeontol. 30 171 Intense oceanic circulation apparently was renewed..as indicated by..accumulation of carbonate-free radiolarian ooze in the Karamba Formation. This entry has been updated (OED Third Edition, June 2008; most recently modified version published online June 2022). < n.adj.1869
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