spheroidaladj.

/sfɛˈrɔɪdəl/

Forms: Also sphæroidal.

Etymology: < spheroid n. + -al suffix¹. So French sphéroïdal, Spanish esferoidal, Portuguese esferoidal.

a. Of form, figure, etc.: Characteristic of a spheroid; approximately spherical.

ΘΚΠ

the world > space > shape > curvature > curved three-dimensional shape or body > [adjective] > spherical or globular > spheroidal > characteristic of a spheroid

spheroidical1708

spheroid1769

spheroidal1781

1781 Philos. Trans. (Royal Soc.) 71 503 Allowing for the spheroidal figure of the earth.

1802 J. Playfair Illustr. Huttonian Theory 493 To account for its assuming the spheroidal figure.

1845 R. B. Todd & W. Bowman Physiol. Anat. I. 138 The spheroidal form of the cranium.

1890 Hardwicke's Sci.-gossip 26 49/1 While the heavier portions..were being drawn together so as to acquire a spheroidal contour.

b. spheroidal condition or state: (see quots. 1860, 1871).

ΘΚΠ

the world > matter > chemistry > physical chemistry > liquid phase > [noun] > condition of > specific

spheroidal condition or state1855

1855 J. Scoffern in Orr's Circle Sci.: Elem. Chem. 190 If it be projected upon a capsule of platinum, maintained at a red heat, the salt..will assume the spheroidal condition.

1860 R. Hunt Ure's Dict. Arts (ed. 5) III. 732 Spheroidal state, the name given by Boutigny to the condition assumed by water when projected into red hot vessels.

1871 B. Stewart Heat (ed. 2) §110 Vaporization in the Spheroidal Condition, where a liquid evaporates slowly although in apparent contact with a very hot substance.

a. Having the form of a spheroid.

ΘΚΠ

the world > space > shape > curvature > curved three-dimensional shape or body > [adjective] > spherical or globular > spheroidal

spheroidical1698

spheroidical1708

subglobose1752

subglobular1773

subround1779

spheroidal1807

globoid1863

1807 C. Hutton Course Math. (ed. 5) II. 348 The spheroidal hollow in the bottom of the bore.

1822 J. Parkinson Outl. Oryctol. 77 A stony polypifer, fixed, in a simple hemi~sphærical or sphæroidal mass.

1867 J. Hogg Microscope (ed. 6) ii. i. 271 A splitting up..into six or eight masses, which become spheroidal sporules.

1878 S. Newcomb Pop. Astron. iv. iii. 998 A constant flattening of the spheroidal atmosphere.

in combination.1891 C. W. M. Moullin Surg. 138 Spheroidal-celled Cancer..occurs in the breast,..nose, and palate.

b. In special applications (see quots.).

ΚΠ

1816 R. Jameson Treat. External Characters Minerals (ed. 2) 204 A Crystal is..Spheroidal..when its surface consists of forty-eight convex faces, as in the diamond.

1842 J. Gwilt Encycl. Archit. Gloss. 1036 Spheroidal Bracketing, that formed to receive the plastering of a spheroid.

1881 St. G. Mivart Cat 26 Or they may be rounded, forming spheroidal epithelium.

1897 T. C. Allbutt et al. Syst. Med. III. 977 Spheroidal carcinoma is rare in the large intestine.

c. Metallurgy. = nodular adj. 3.

ΘΚΠ

society > occupation and work > materials > derived or manufactured material > metal > iron > [adjective] > made of cast iron > types of cast iron

chilled1831

black heart1872

white-heart1911

spheroidal1920

nodular1947

1920 Jrnl. Iron & Steel Inst. 102 261 The present experiments were undertaken to clear up the cause of the formation of the spheroidal cementite.

1957 Technology July 172/3 To-day, nodular or spheroidal graphite cast iron is an article of commercial manufacture.

1977 Metals Abstr. X. 1801/1 Tests were made on boronizing spheroidal graphite cast iron (SGCI) to improve surface hardness and wear resistance.

3. Dealing with the properties of spheroids.

ΘΚΠ

the world > relative properties > number > geometry > shape or figure > [adjective] > three-dimensional > spherical or spheroidal

spheric1559

spherical1728

spheroidal1876

1876–7 A. Cayley Coll. Math. Papers (1896) IX. 197 The fundamental formulæ of Spheroidal Trigonometry are those which belong to a right-angled triangle.

Derivatives

spheˈroidally adv. after a spheroidal manner; so as to form spheroids.

ΘΚΠ

the world > space > shape > curvature > curved three-dimensional shape or body > [adverb] > spherically > spheroidally

spheroidically1786

spheroidally1888

1888 Q. Jrnl. Geol. Soc. 44 450 The great mass of Mynydd-y-Rhiw..is largely built up of spheroidally jointed rock.

This entry has not yet been fully updated (first published 1914; most recently modified version published online December 2020).

单词	spheroidal
释义	spheroidaladj. /sfɛˈrɔɪdəl/ Forms: Also sphæroidal. Etymology: < spheroid n. + -al suffix¹. So French sphéroïdal, Spanish esferoidal, Portuguese esferoidal. 1. a. Of form, figure, etc.: Characteristic of a spheroid; approximately spherical. ΘΚΠ the world > space > shape > curvature > curved three-dimensional shape or body > [adjective] > spherical or globular > spheroidal > characteristic of a spheroid spheroidical1708 spheroid1769 spheroidal1781 1781 Philos. Trans. (Royal Soc.) 71 503 Allowing for the spheroidal figure of the earth. 1802 J. Playfair Illustr. Huttonian Theory 493 To account for its assuming the spheroidal figure. 1845 R. B. Todd & W. Bowman Physiol. Anat. I. 138 The spheroidal form of the cranium. 1890 Hardwicke's Sci.-gossip 26 49/1 While the heavier portions..were being drawn together so as to acquire a spheroidal contour. b. spheroidal condition or state: (see quots. 1860, 1871). ΘΚΠ the world > matter > chemistry > physical chemistry > liquid phase > [noun] > condition of > specific spheroidal condition or state1855 1855 J. Scoffern in Orr's Circle Sci.: Elem. Chem. 190 If it be projected upon a capsule of platinum, maintained at a red heat, the salt..will assume the spheroidal condition. 1860 R. Hunt Ure's Dict. Arts (ed. 5) III. 732 Spheroidal state, the name given by Boutigny to the condition assumed by water when projected into red hot vessels. 1871 B. Stewart Heat (ed. 2) §110 Vaporization in the Spheroidal Condition, where a liquid evaporates slowly although in apparent contact with a very hot substance. 2. a. Having the form of a spheroid. ΘΚΠ the world > space > shape > curvature > curved three-dimensional shape or body > [adjective] > spherical or globular > spheroidal spheroidical1698 spheroidical1708 subglobose1752 subglobular1773 subround1779 spheroidal1807 globoid1863 1807 C. Hutton Course Math. (ed. 5) II. 348 The spheroidal hollow in the bottom of the bore. 1822 J. Parkinson Outl. Oryctol. 77 A stony polypifer, fixed, in a simple hemi~sphærical or sphæroidal mass. 1867 J. Hogg Microscope (ed. 6) ii. i. 271 A splitting up..into six or eight masses, which become spheroidal sporules. 1878 S. Newcomb Pop. Astron. iv. iii. 998 A constant flattening of the spheroidal atmosphere. in combination.1891 C. W. M. Moullin Surg. 138 Spheroidal-celled Cancer..occurs in the breast,..nose, and palate. b. In special applications (see quots.). ΚΠ 1816 R. Jameson Treat. External Characters Minerals (ed. 2) 204 A Crystal is..Spheroidal..when its surface consists of forty-eight convex faces, as in the diamond. 1842 J. Gwilt Encycl. Archit. Gloss. 1036 Spheroidal Bracketing, that formed to receive the plastering of a spheroid. 1881 St. G. Mivart Cat 26 Or they may be rounded, forming spheroidal epithelium. 1897 T. C. Allbutt et al. Syst. Med. III. 977 Spheroidal carcinoma is rare in the large intestine. c. Metallurgy. = nodular adj. 3. ΘΚΠ society > occupation and work > materials > derived or manufactured material > metal > iron > [adjective] > made of cast iron > types of cast iron chilled1831 black heart1872 white-heart1911 spheroidal1920 nodular1947 1920 Jrnl. Iron & Steel Inst. 102 261 The present experiments were undertaken to clear up the cause of the formation of the spheroidal cementite. 1957 Technology July 172/3 To-day, nodular or spheroidal graphite cast iron is an article of commercial manufacture. 1977 Metals Abstr. X. 1801/1 Tests were made on boronizing spheroidal graphite cast iron (SGCI) to improve surface hardness and wear resistance. 3. Dealing with the properties of spheroids. ΘΚΠ the world > relative properties > number > geometry > shape or figure > [adjective] > three-dimensional > spherical or spheroidal spheric1559 spherical1728 spheroidal1876 1876–7 A. Cayley Coll. Math. Papers (1896) IX. 197 The fundamental formulæ of Spheroidal Trigonometry are those which belong to a right-angled triangle. Derivatives spheˈroidally adv. after a spheroidal manner; so as to form spheroids. ΘΚΠ the world > space > shape > curvature > curved three-dimensional shape or body > [adverb] > spherically > spheroidally spheroidically1786 spheroidally1888 1888 Q. Jrnl. Geol. Soc. 44 450 The great mass of Mynydd-y-Rhiw..is largely built up of spheroidally jointed rock. This entry has not yet been fully updated (first published 1914; most recently modified version published online December 2020). < adj.1781
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