orbitoidadj.n.

Brit.

/ˈɔːbᵻtɔɪd/, U.S.

/ˈɔrbəˌtɔɪd/

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

Etymology: < scientific Latin Orbitoides, genus name (A. d'Orbigny: see quot. 1848) < classical Latin orbita orbit n. + -oīdēs -oid suffix. Compare slightly earlier orbitoidal adj.1848 C. Lyell in Q. Jrnl. Geol. Soc. 4 i. 12 A letter reached me from M. D'Orbigny, of which I subjoin a translation:—(Paris 18^th June 1847) It is a genus nearly allied to Orbitolina, and which I have named in consequence of this analogy, Orbitoides.

Palaeontology.

A. adj.

Of, belonging to, or designating a fossil foraminiferan of the genus Orbitoides, family Orbitoididae, or superfamily Orbitoidacea, typically having a discoid or lenticular shell.

ΘΚΠ

the world > animals > invertebrates > protozoa > class Sarcodina > order Rhizopoda > [adjective] > relating to Foraminifera

orbitoid1852

foraminiferal1865

megalospheric1896

1852 C. Lyell Man. Elem. Geol. (ed. 4) xvi. 190 (heading) Orbitoid limestone.

1917 Prof. Papers U.S. Geol. Surv. 109 (title) The stratigraphic position and faunal associates of the orbitoid foraminifera of the genus Orthophragmina from Georgia and Florida.

1973 Nature 8 June 342/1 On the debit side, the Miocene witnessed the extinction of the larger orbitoid and nummulitid foraminifera.

B. n.

Such a fossil.

ΘΚΠ

the world > animals > invertebrates > protozoa > class Sarcodina > order Rhizopoda > [noun] > suborder Foraminifera > member of > fossil shell of genus Orbitoides

orbitoid1885

1885 Amer. Jrnl. Sci. 130 70 I found..a small specimen of an Orbitoid.

1945 M. F. Glaessner Princ. Micropalaeont. ii. v. 163 In orbitoids the median chambers are never rectangular.

1961 J. Stubblefield Davies's Introd. Palaeontol. (ed. 3) x. 238 Orbitolites (Eoc.) and Marginopora (Mio.—Rec.) are discoidal and cyclical (like the Orbitoids).

1991 R. Goldring Fossils in Field iv. 74 Fusulines (Upper Palaeozoic), alveolinids (Mesozoic onwards), and rotalids (e.g. Nummulites, orbitoids of the Tertiary) all had calcitic skeletons.

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

单词	orbitoid
释义	orbitoidadj.n. Brit. /ˈɔːbᵻtɔɪd/, U.S. /ˈɔrbəˌtɔɪd/ Origin: A borrowing from Latin. Etymon: Latin Orbitoides. Etymology: < scientific Latin Orbitoides, genus name (A. d'Orbigny: see quot. 1848) < classical Latin orbita orbit n. + -oīdēs -oid suffix. Compare slightly earlier orbitoidal adj.1848 C. Lyell in Q. Jrnl. Geol. Soc. 4 i. 12 A letter reached me from M. D'Orbigny, of which I subjoin a translation:—(Paris 18^th June 1847) It is a genus nearly allied to Orbitolina, and which I have named in consequence of this analogy, Orbitoides. Palaeontology. A. adj. Of, belonging to, or designating a fossil foraminiferan of the genus Orbitoides, family Orbitoididae, or superfamily Orbitoidacea, typically having a discoid or lenticular shell. ΘΚΠ the world > animals > invertebrates > protozoa > class Sarcodina > order Rhizopoda > [adjective] > relating to Foraminifera orbitoid1852 foraminiferal1865 megalospheric1896 1852 C. Lyell Man. Elem. Geol. (ed. 4) xvi. 190 (heading) Orbitoid limestone. 1917 Prof. Papers U.S. Geol. Surv. 109 (title) The stratigraphic position and faunal associates of the orbitoid foraminifera of the genus Orthophragmina from Georgia and Florida. 1973 Nature 8 June 342/1 On the debit side, the Miocene witnessed the extinction of the larger orbitoid and nummulitid foraminifera. B. n. Such a fossil. ΘΚΠ the world > animals > invertebrates > protozoa > class Sarcodina > order Rhizopoda > [noun] > suborder Foraminifera > member of > fossil shell of genus Orbitoides orbitoid1885 1885 Amer. Jrnl. Sci. 130 70 I found..a small specimen of an Orbitoid. 1945 M. F. Glaessner Princ. Micropalaeont. ii. v. 163 In orbitoids the median chambers are never rectangular. 1961 J. Stubblefield Davies's Introd. Palaeontol. (ed. 3) x. 238 Orbitolites (Eoc.) and Marginopora (Mio.—Rec.) are discoidal and cyclical (like the Orbitoids). 1991 R. Goldring Fossils in Field iv. 74 Fusulines (Upper Palaeozoic), alveolinids (Mesozoic onwards), and rotalids (e.g. Nummulites, orbitoids of the Tertiary) all had calcitic skeletons. This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022). < adj.n.1852
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