rhombn.

Brit.

/rɒm(b)/, U.S.

/rɑm(b)/

Forms: 1500s rombe, 1600s–1700s rhombe, 1600s romb, 1600s roumb, 1600s– rhomb, 1700s–1800s rumb.

Origin: Of multiple origins. Partly a borrowing from French. Partly a borrowing from Latin. Etymons: French rhombe; Latin rhombus.

Etymology: < Middle French, French rhombe (1505 denoting a fish, 1536 in geometry, 1564 denoting a spinning top) and its etymon classical Latin rhombus rhombus n. With sense 1a compare also Spanish rombo (16th cent.), Italian rombo (14th cent.). With sense 3 compare also Old Occitan rom (13th cent.), romp , rombo (both 15th cent.), Spanish rombo (16th cent.), Italian rombo (15th cent.). Compare slightly earlier rhombus n.

I. A geometrical shape (and related senses).

a. Geometry. = rhombus n. 2.

ΘΚΠ

the world > space > shape > angularity > specific angular shape > [noun] > quadrilateral > lozenge, diamond, or rhomb

lozenge?a1366

mascle1453

diamond1496

lozenger1527

rhombus?a1560

rhomb1578

romby1592

the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > quadrilateral > rhombus

like-side1551

lozenge1551

rhombus?a1560

rhomboid1570

rhomboides1570

rhomb1578

1578 T. Ellis True Rep. Last Voy. Meta Incognita sig. Bvj^v We builded a litle house..& garnished it with many kindes of trifles, as Pinnes, Pointes, Laces, Glasses, Rombes.

1597 T. Morley Plaine & Easie Introd. Musicke Annot. sig. ¶4 The semibriefe was at the first framed like a triangle..but..it grew afterward to the figure of a rombe or loseng.

1671 J. Milton Paradise Regain'd iii. 308 See how in warlike muster they appear, In Rhombs and wedges, and half moons, and wings.

1726 J. Swift Gulliver II. iii. ii. 26 If they would..praise the Beauty of a Woman or any other Animal, they describe it by Rhombs, Circles,..and other Geometrical Terms.

1818 W. Kirby & W. Spence Introd. Entomol. (ed. 3) I. xv. 489 The great angles of the rhombs should be 109° 26′, and of the small angles 70° 34′.

1849 H. Miller Foot-prints of Creator 35 The more amply imbricated tile-like rhombs of the Dipterians and Palaeonisci.

1859 C. Darwin Origin of Species viii. 225 Each cell..is an hexagonal prism, with the basal edges of its six sides bevelled so as to join on to a pyramid, formed of three rhombs.

1908 Daily Chron. 16 July 3/2 The trey of diamonds which exhibits three rhombs on one card.

1997 P. Arthur & R. Ling Insula of Menander at Pompeii I. ii. 158 Pieces of coloured marbles (triangles of cipollino and rhombs of palombino).

b. Palaeontology. = pore rhomb n. at pore n.¹ Compounds 2.

ΚΠ

1848 E. Forbes in Mem. Geol. Surv. 2 ii. 485 Certain curious organs or appendages connected with the plates, to which the name of pectinated rhombs may be appropriately given.

1866 Mem. Geol. Surv. 3 284 The rhombs and pores on the surface are hardly less remarkable characters, and in the form they assume peculiar to the group.

1993 E. N. K. Clarkson Invertebr. Palaeontol. & Evol. (ed. 3) ix. 294/2 Rhombiferans may have exo- or endothecal pore structure always arranged in parallel sets with a rhomb-shaped contour. Each rhomb crosses a plate boundary.

a. Crystallography. A rhombohedron; a rhombohedral crystal.

ΘΚΠ

the world > matter > chemistry > crystallography (general) > crystal (general) > specific crystal forms > [noun] > rhombohedron

rhomb1685

rhomboid1753

rhombohedron1814

1685 N. Grew Musæum Regalis Societatis (new ed.) iii. 310 A Rhomb of Muscovy-Glass. This Stone is by most called Selenites. By some Mariæ Glacies.

1778 W. Pryce Mineralogia Cornubiensis 28 Neither have we yet seen a perfect Sparry Rhomb in Cornwall.

1815 R. Bakewell Introd. Geol. (ed. 2) iii. 48 Calcareous stalactites..cleave into regular rhombs.

1869 J. Tyndall Notes 9 Lect. on Light §419 When a small aperture through which light passes is regarded through a rhomb of Iceland spar two apertures are seen.

1929 W. F. Foshag in G. P. Merrill Minerals from Earth & Sky ii. ii. 174 Calcite may be found as flat or steep rhombs, as prisms, or steep pyramidal forms.

1990 Protein Engin. 4 114/1 The crystals are large orange rhombs.

b. Fresnel's rhomb n. see Fresnel n. 1.

†3. A kind of flatfish; = rhombus n. 1a. Obsolete. rare.

ΘΚΠ

the world > animals > fish > superorder Acanthopterygii (spiny fins) > order Perciformes (perches) > order Pleuronectiformes (flat-fish) > [noun] > family Scophthalmidae (turbot) > genus or member of Scophthalmus > scophthalmus maximus (turbot)

buttc1300

turbotc1300

sprent1324

breta1475

birt1552

sea pheasant1633

rhomb1720

brat1760

rodden fluke1793

king-fluke1895

1720 J. Strype tr. in Stow's Survey of London (rev. ed.) II. v. xxvii. 366/2 [Translating a statute of c1274 for buying fish] A Piece of Rumb, gross and fat, for 4d.

1785 W. Crakelt Entick's New Spelling Dict. (rev. ed.) 321 Rhomb, a quadrangular figure, wheel, fish.

1790 T. Pennant Of London 293 I confess myself unacquainted with the words Barkey, Bran, and Betule:..I am equally at a loss about Croplings, and Rumb.

†4. Conchology. = rhomb-shell n. at Compounds 2. Obsolete. rare.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Gastropoda > [noun] > superorder Branchifera > order Prosobranchiata > section Siphonostomata > family Volutidae > member of

musical-shell1666

music shell1666

rhomb-shell?1711

rhomb1815

1815 E. J. Burrow Elements Conchol. 200 Porphyria, Large clouded Rhomb or Camp Olive. Oliva, Yellow Rhomb; Olive... Paupercula, Zebra Rhomb.

1822 J. Mawe Wodarch's Introd. Study of Conchol. (ed. 2) 87 [Voluta] paupercula (Zebra Rhomb).

†II. An object that revolves.

5. An object that revolves or spins, as a spinning wheel, a reel, a whorl, a top, etc.; (Ancient History) such an object used for magical purposes. Obsolete.In quot. 1667 in extended use, referring to the rotation of the earth.

ΘΚΠ

the world > space > shape > curvature > roundness > [noun] > circularity > a circle

rondelc1300

roundelc1300

circlec1305

compass1340

rondelet1385

cerne1393

burrc1440

orba1460

O1492

O1531

circular1575

rotundo1614

rhomb1656

circumference1667

1656 T. Blount Glossographia [after Cotgr.] Rhomb, a Spinning Wheel, Reel, or Whirle.

1667 J. Milton Paradise Lost viii. 134 That swift Nocturnal and Diurnal rhomb suppos'd, Invisible else above all Starrs, the Wheele of Day and Night.

1697 Abell in J. Potter Archæologiæ Græcæ iv. x. 269 [Translating Ovid Amores i. viii. 7–8] She knows the Vertue of each Herb to move The latent Seeds of a coy Lady's Love, She knows the Rhomb, what Feats in Magick are From th' pois'nous Issue of a lustfull Mare.

1785 W. Crakelt Entick's New Spelling Dict. (rev. ed.) 321 Rhomb, a quadrangular figure, wheel, fish.

1846 F. Ringwood Select. Theocritus, Bion, & Moschus Gloss. p. xcviii Whatever may have been the exact method of its employment, ίνγξ [= iynx, a small bird] passed into the signification of a magic wheel or rhomb.

Compounds

C1.

rhomb-marked adj.

ΚΠ

1876 Proc. Zool. Soc. 829 1 Rhomb-marked Snake (Psammophylax rhombeatus).

2004 M. B. Keck in J. W. Gibbons & M. E. Dorcas N. Amer. Watersnakes 140/1 Local and regional names used for N[erodia] r. rhombifer include..North American rhomb-marked snake..and water snake.

rhomb-shaped adj.

ΚΠ

1793 T. Martyn Lang. Bot. sig. Q6 Rhombeum folium, a Rhombed or rhomb-shaped leaf.

1796 W. Withering Arrangem. Brit. Plants (ed. 3) II. 483 Petals rhomb-shaped.

1850 Ann. Hort. 210/1 The leaves are rhomb-shaped and glaucous.

1962 D. Nichols Echinoderms xi. 136 It diminishes at either end,..forming a rhomb-shaped area.

C2.

rhomb-dodecahedron n. Geometry = rhombododecahedron n. at rhombo- comb. form 2.

ΚΠ

1833 Abstr. Papers Royal Soc. 1815–30 2 229 Consider the cases of the irregular tetrahedron and octohedron, the triangular prism, and rhomb dodecahedron.

1895 N. Story-Maskelyne Crystallogr. 195 Diamond, gold, and electrum are among the substances that occur in rhomb-dodecahedra.

2006 W.Schumann Gemstones of World (ed. 3) 15 Pyrite is often found in the shape of a pentagon dodecahedron, garnet, as a rhomb-dodecahedron.

rhomb-porphyry n. [after German Rhombenporphyr (L. von Buch 1810, in the passage translated in quot. 1813)] Geology a porphyry (porphyry n. 3) containing feldspar phenocrysts with a rhombic cross-section.

ΚΠ

1813 J. Black tr. L. von Buch Trav. Norway & Lapland iii. 50 This very porphyry, with the singular rhombs of felspar, is by no means rare in the porphyry mountains... This porphyry may therefore be called rhomb-porphyry.

1895 L. Fletcher Introd. Study Rocks 104 A quartz-less division [of porphyries]..includes various rocks chemically allied to syenite; among them are..orthoclase-porphyries, rhomb-porphyries and keratophyres.

1990 C. Pellant Rocks, Minerals & Fossils 17/3 This group of rocks also includes the rhomb-porphyrys of Norway which are so characteristic of that area that they are useful as indicators of glacial movement.

† rhomb-shell n. Conchology Obsolete a gastropod mollusc whose shell is roughly cylindrical to biconic in shape; the shell itself; cf. rhombus n. 1b.

ΘΚΠ

musical-shell1666

music shell1666

rhomb-shell?1711

rhomb1815

?1711 J. Petiver Gazophylacii VII.–VIII. Table 75 A White Indian Rhomb-shell finely speckled with black.

1815 E. J. Burrow Elements Conchol. 200 Voluta, Rhomb Shell or Cylinder.

1885 Longman's Mag. July 262 Bamboo-joint and capacious rhomb-shell..supplied him with congenial implements for drink and storage.

† rhomb-solid n. Geometry Obsolete a solid figure formed by the revolution of a rhombus around a diagonal, comprising two equal right cones joined together at their bases; = rhombus-solid n. at rhombus n. Compounds 2.

ΘΚΠ

the world > relative properties > number > geometry > shape or figure > [noun] > three-dimensional > solid of revolution > formed from rhomb

rhomb-solid1704

rhombus-solid1795

1704 J. Harris Lexicon Technicum I Rhombe Solid.

1815 C. Hutton Math. & Philos. Dict. (new ed.) II. Rhomb-solid, consists of two equal and right cones joined together at their bases.

1892 F. H. Teall Eng. Compound Words & Phrases 216/1 Rhomb-solid.

† rhomb spar n. [compare German Rhomboidalspath (18th cent.)] Mineralogy Obsolete = dolomite n. a.

ΘΚΠ

the world > the earth > minerals > types of mineral > carbonates > [noun] > hexagonal > dolomite > varieties

pearl spar1793

miemite1804

rhomb spar1804

gurhofite1816

brown-spar1843

pennite1850

tharandite1850

kutnahorite1907

huntite1953

protodolomite1955

1804 R. Jameson Syst. Mineral. I. 516 Calc Genus. Seventh Species. Rhomb-spar.

1837 J. D. Dana Syst. Mineral. 197 The names Rhomb spar and Bitter spar, have been applied to the perfectly crystallized specimens [of dolomite], excepting those with curved faces and a pearly lustre, which have been designated Pearl spar.

1898 Proc. Amer. Philos. Soc. 37 117 The limestones in the bluffs..contain in the cavities of their fossils crystals of pyrite and rhomb spar.

This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).

单词	rhomb
释义	rhombn. Brit. /rɒm(b)/, U.S. /rɑm(b)/ Forms: 1500s rombe, 1600s–1700s rhombe, 1600s romb, 1600s roumb, 1600s– rhomb, 1700s–1800s rumb. Origin: Of multiple origins. Partly a borrowing from French. Partly a borrowing from Latin. Etymons: French rhombe; Latin rhombus. Etymology: < Middle French, French rhombe (1505 denoting a fish, 1536 in geometry, 1564 denoting a spinning top) and its etymon classical Latin rhombus rhombus n. With sense 1a compare also Spanish rombo (16th cent.), Italian rombo (14th cent.). With sense 3 compare also Old Occitan rom (13th cent.), romp , rombo (both 15th cent.), Spanish rombo (16th cent.), Italian rombo (15th cent.). Compare slightly earlier rhombus n. I. A geometrical shape (and related senses). 1. a. Geometry. = rhombus n. 2. ΘΚΠ the world > space > shape > angularity > specific angular shape > [noun] > quadrilateral > lozenge, diamond, or rhomb lozenge?a1366 mascle1453 diamond1496 lozenger1527 rhombus?a1560 rhomb1578 romby1592 the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > quadrilateral > rhombus like-side1551 lozenge1551 rhombus?a1560 rhomboid1570 rhomboides1570 rhomb1578 1578 T. Ellis True Rep. Last Voy. Meta Incognita sig. Bvj^v We builded a litle house..& garnished it with many kindes of trifles, as Pinnes, Pointes, Laces, Glasses, Rombes. 1597 T. Morley Plaine & Easie Introd. Musicke Annot. sig. ¶4 The semibriefe was at the first framed like a triangle..but..it grew afterward to the figure of a rombe or loseng. 1671 J. Milton Paradise Regain'd iii. 308 See how in warlike muster they appear, In Rhombs and wedges, and half moons, and wings. View more context for this quotation 1726 J. Swift Gulliver II. iii. ii. 26 If they would..praise the Beauty of a Woman or any other Animal, they describe it by Rhombs, Circles,..and other Geometrical Terms. 1818 W. Kirby & W. Spence Introd. Entomol. (ed. 3) I. xv. 489 The great angles of the rhombs should be 109° 26′, and of the small angles 70° 34′. 1849 H. Miller Foot-prints of Creator 35 The more amply imbricated tile-like rhombs of the Dipterians and Palaeonisci. 1859 C. Darwin Origin of Species viii. 225 Each cell..is an hexagonal prism, with the basal edges of its six sides bevelled so as to join on to a pyramid, formed of three rhombs. 1908 Daily Chron. 16 July 3/2 The trey of diamonds which exhibits three rhombs on one card. 1997 P. Arthur & R. Ling Insula of Menander at Pompeii I. ii. 158 Pieces of coloured marbles (triangles of cipollino and rhombs of palombino). b. Palaeontology. = pore rhomb n. at pore n.¹ Compounds 2. ΚΠ 1848 E. Forbes in Mem. Geol. Surv. 2 ii. 485 Certain curious organs or appendages connected with the plates, to which the name of pectinated rhombs may be appropriately given. 1866 Mem. Geol. Surv. 3 284 The rhombs and pores on the surface are hardly less remarkable characters, and in the form they assume peculiar to the group. 1993 E. N. K. Clarkson Invertebr. Palaeontol. & Evol. (ed. 3) ix. 294/2 Rhombiferans may have exo- or endothecal pore structure always arranged in parallel sets with a rhomb-shaped contour. Each rhomb crosses a plate boundary. 2. a. Crystallography. A rhombohedron; a rhombohedral crystal. ΘΚΠ the world > matter > chemistry > crystallography (general) > crystal (general) > specific crystal forms > [noun] > rhombohedron rhomb1685 rhomboid1753 rhombohedron1814 1685 N. Grew Musæum Regalis Societatis (new ed.) iii. 310 A Rhomb of Muscovy-Glass. This Stone is by most called Selenites. By some Mariæ Glacies. 1778 W. Pryce Mineralogia Cornubiensis 28 Neither have we yet seen a perfect Sparry Rhomb in Cornwall. 1815 R. Bakewell Introd. Geol. (ed. 2) iii. 48 Calcareous stalactites..cleave into regular rhombs. 1869 J. Tyndall Notes 9 Lect. on Light §419 When a small aperture through which light passes is regarded through a rhomb of Iceland spar two apertures are seen. 1929 W. F. Foshag in G. P. Merrill Minerals from Earth & Sky ii. ii. 174 Calcite may be found as flat or steep rhombs, as prisms, or steep pyramidal forms. 1990 Protein Engin. 4 114/1 The crystals are large orange rhombs. b. Fresnel's rhomb n. see Fresnel n. 1. †3. A kind of flatfish; = rhombus n. 1a. Obsolete. rare. ΘΚΠ the world > animals > fish > superorder Acanthopterygii (spiny fins) > order Perciformes (perches) > order Pleuronectiformes (flat-fish) > [noun] > family Scophthalmidae (turbot) > genus or member of Scophthalmus > scophthalmus maximus (turbot) buttc1300 turbotc1300 sprent1324 breta1475 birt1552 sea pheasant1633 rhomb1720 brat1760 rodden fluke1793 king-fluke1895 1720 J. Strype tr. in Stow's Survey of London (rev. ed.) II. v. xxvii. 366/2 [Translating a statute of c1274 for buying fish] A Piece of Rumb, gross and fat, for 4d. 1785 W. Crakelt Entick's New Spelling Dict. (rev. ed.) 321 Rhomb, a quadrangular figure, wheel, fish. 1790 T. Pennant Of London 293 I confess myself unacquainted with the words Barkey, Bran, and Betule:..I am equally at a loss about Croplings, and Rumb. †4. Conchology. = rhomb-shell n. at Compounds 2. Obsolete. rare. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Gastropoda > [noun] > superorder Branchifera > order Prosobranchiata > section Siphonostomata > family Volutidae > member of musical-shell1666 music shell1666 rhomb-shell?1711 rhomb1815 1815 E. J. Burrow Elements Conchol. 200 Porphyria, Large clouded Rhomb or Camp Olive. Oliva, Yellow Rhomb; Olive... Paupercula, Zebra Rhomb. 1822 J. Mawe Wodarch's Introd. Study of Conchol. (ed. 2) 87 [Voluta] paupercula (Zebra Rhomb). †II. An object that revolves. 5. An object that revolves or spins, as a spinning wheel, a reel, a whorl, a top, etc.; (Ancient History) such an object used for magical purposes. Obsolete.In quot. 1667 in extended use, referring to the rotation of the earth. ΘΚΠ the world > space > shape > curvature > roundness > [noun] > circularity > a circle rondelc1300 roundelc1300 circlec1305 compass1340 rondelet1385 cerne1393 burrc1440 orba1460 O1492 O1531 circular1575 rotundo1614 rhomb1656 circumference1667 1656 T. Blount Glossographia [after Cotgr.] Rhomb, a Spinning Wheel, Reel, or Whirle. 1667 J. Milton Paradise Lost viii. 134 That swift Nocturnal and Diurnal rhomb suppos'd, Invisible else above all Starrs, the Wheele of Day and Night. View more context for this quotation 1697 Abell in J. Potter Archæologiæ Græcæ iv. x. 269 [Translating Ovid Amores i. viii. 7–8] She knows the Vertue of each Herb to move The latent Seeds of a coy Lady's Love, She knows the Rhomb, what Feats in Magick are From th' pois'nous Issue of a lustfull Mare. 1785 W. Crakelt Entick's New Spelling Dict. (rev. ed.) 321 Rhomb, a quadrangular figure, wheel, fish. 1846 F. Ringwood Select. Theocritus, Bion, & Moschus Gloss. p. xcviii Whatever may have been the exact method of its employment, ίνγξ [= iynx, a small bird] passed into the signification of a magic wheel or rhomb. Compounds C1. rhomb-marked adj. ΚΠ 1876 Proc. Zool. Soc. 829 1 Rhomb-marked Snake (Psammophylax rhombeatus). 2004 M. B. Keck in J. W. Gibbons & M. E. Dorcas N. Amer. Watersnakes 140/1 Local and regional names used for N[erodia] r. rhombifer include..North American rhomb-marked snake..and water snake. rhomb-shaped adj. ΚΠ 1793 T. Martyn Lang. Bot. sig. Q6 Rhombeum folium, a Rhombed or rhomb-shaped leaf. 1796 W. Withering Arrangem. Brit. Plants (ed. 3) II. 483 Petals rhomb-shaped. 1850 Ann. Hort. 210/1 The leaves are rhomb-shaped and glaucous. 1962 D. Nichols Echinoderms xi. 136 It diminishes at either end,..forming a rhomb-shaped area. C2. rhomb-dodecahedron n. Geometry = rhombododecahedron n. at rhombo- comb. form 2. ΚΠ 1833 Abstr. Papers Royal Soc. 1815–30 2 229 Consider the cases of the irregular tetrahedron and octohedron, the triangular prism, and rhomb dodecahedron. 1895 N. Story-Maskelyne Crystallogr. 195 Diamond, gold, and electrum are among the substances that occur in rhomb-dodecahedra. 2006 W.Schumann Gemstones of World (ed. 3) 15 Pyrite is often found in the shape of a pentagon dodecahedron, garnet, as a rhomb-dodecahedron. rhomb-porphyry n. [after German Rhombenporphyr (L. von Buch 1810, in the passage translated in quot. 1813)] Geology a porphyry (porphyry n. 3) containing feldspar phenocrysts with a rhombic cross-section. ΚΠ 1813 J. Black tr. L. von Buch Trav. Norway & Lapland iii. 50 This very porphyry, with the singular rhombs of felspar, is by no means rare in the porphyry mountains... This porphyry may therefore be called rhomb-porphyry. 1895 L. Fletcher Introd. Study Rocks 104 A quartz-less division [of porphyries]..includes various rocks chemically allied to syenite; among them are..orthoclase-porphyries, rhomb-porphyries and keratophyres. 1990 C. Pellant Rocks, Minerals & Fossils 17/3 This group of rocks also includes the rhomb-porphyrys of Norway which are so characteristic of that area that they are useful as indicators of glacial movement. † rhomb-shell n. Conchology Obsolete a gastropod mollusc whose shell is roughly cylindrical to biconic in shape; the shell itself; cf. rhombus n. 1b. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Gastropoda > [noun] > superorder Branchifera > order Prosobranchiata > section Siphonostomata > family Volutidae > member of musical-shell1666 music shell1666 rhomb-shell?1711 rhomb1815 ?1711 J. Petiver Gazophylacii VII.–VIII. Table 75 A White Indian Rhomb-shell finely speckled with black. 1815 E. J. Burrow Elements Conchol. 200 Voluta, Rhomb Shell or Cylinder. 1885 Longman's Mag. July 262 Bamboo-joint and capacious rhomb-shell..supplied him with congenial implements for drink and storage. † rhomb-solid n. Geometry Obsolete a solid figure formed by the revolution of a rhombus around a diagonal, comprising two equal right cones joined together at their bases; = rhombus-solid n. at rhombus n. Compounds 2. ΘΚΠ the world > relative properties > number > geometry > shape or figure > [noun] > three-dimensional > solid of revolution > formed from rhomb rhomb-solid1704 rhombus-solid1795 1704 J. Harris Lexicon Technicum I Rhombe Solid. 1815 C. Hutton Math. & Philos. Dict. (new ed.) II. Rhomb-solid, consists of two equal and right cones joined together at their bases. 1892 F. H. Teall Eng. Compound Words & Phrases 216/1 Rhomb-solid. † rhomb spar n. [compare German Rhomboidalspath (18th cent.)] Mineralogy Obsolete = dolomite n. a. ΘΚΠ the world > the earth > minerals > types of mineral > carbonates > [noun] > hexagonal > dolomite > varieties pearl spar1793 miemite1804 rhomb spar1804 gurhofite1816 brown-spar1843 pennite1850 tharandite1850 kutnahorite1907 huntite1953 protodolomite1955 1804 R. Jameson Syst. Mineral. I. 516 Calc Genus. Seventh Species. Rhomb-spar. 1837 J. D. Dana Syst. Mineral. 197 The names Rhomb spar and Bitter spar, have been applied to the perfectly crystallized specimens [of dolomite], excepting those with curved faces and a pearly lustre, which have been designated Pearl spar. 1898 Proc. Amer. Philos. Soc. 37 117 The limestones in the bluffs..contain in the cavities of their fossils crystals of pyrite and rhomb spar. This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022). < n.1578
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