sphenoidadj.n.

Brit.

/ˈsfiːnɔɪd/, U.S.

/ˈsfiˌnɔɪd/

Forms: Also 1700s sphænoid, 1800s sphenoïd.

Etymology: < modern Latin sphēnoidēs, sphēnoeidēs (†sphæno- ), < Greek σϕηνοειδής , < σϕήν wedge: see -oid suffix. So French sphénoïde (1611).

A. adj.

sphenoid bone n. a bone of irregular form situated at the base of the skull, where it is wedged in between the other bones of the cranium.

ΘΚΠ

the world > life > the body > structural parts > bone or bones > skull > parts of skull > [noun] > sphenoid bone

wedge-bone1615

sphenoidal bone1726

sphenoid bone1732

sphenoid1828

1732 A. Monro Anat. (ed. 2) 76 I have seen separate..Bones at the Conjunction..of the sphenoid and parietal Bones.

1768 Philos. Trans. 1767 (Royal Soc.) 57 119 Portions of medullary substance lying upon the sphænoid bone.

1831 R. Knox tr. H. Cloquet Syst. Human Anat. (ed. 2) 41 The sphenoid bone is articulated with the frontal, ethmoid, occipital, parietal, and temporal bones.

1884 M. Mackenzie Man. Dis. Throat & Nose II. 232 The posterior third of the roof..is formed by the body of the sphenoid bone.

B. n.

1. Anatomy. The sphenoid bone; one or other of the separate parts of this.

ΘΚΠ

the world > life > the body > structural parts > bone or bones > skull > parts of skull > [noun] > sphenoid bone

wedge-bone1615

sphenoidal bone1726

sphenoid bone1732

sphenoid1828

1828 J. Stark Elements Nat. Hist. I. 28 In the fœtus the occiput is divided into four parts, the body of the sphenoid into two.

1841 T. R. Jones Gen. Outl. Animal Kingdom xxx. 638 These two halves may..be called, respectively, the anterior and posterior sphenoids.

1896 J. W. Kirkaldy & E. C. Pollard tr. J. E. V. Boas Text Bk. Zool. 362 In the basal and lateral regions in front of the parts just mentioned are the sphenoids (ali-, orbito-, and basi-shenoid).

2. Crystallography. A wedge-shaped crystal bounded by four equal and similar triangular faces.

ΘΚΠ

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

tripyramid1828

trisoctahedron1837

fluoroid1850

sphenoid1855

discalenohedron1872

prism1878

tetrakis-hexahedron1878

galenoid1882

macroprism1883

semi-form1895

tetartohedron1895

tetrakisdodecahedron1895

trichite1900

1855 D. T. Ansted et al. in Orr's Circle Sci.: Inorg. Nature 435 The Rhombic Sphenoid, or, Irregular Tetrahedron, is a hemihedral form, derived from the double four-faced rhombic pyramid.

1855 D. T. Ansted et al. in Orr's Circle Sci.: Inorg. Nature 435 A sphenoid may be derived from every one of the pyramids previously described.

1878 H. P. Gurney Crystallogr. 78 A closed figure bounded by four similar isosceles triangles..is sometimes called a sphenoid.

This entry has not yet been fully updated (first published 1914; most recently modified version published online March 2022).

单词	sphenoid
释义	sphenoidadj.n. Brit. /ˈsfiːnɔɪd/, U.S. /ˈsfiˌnɔɪd/ Forms: Also 1700s sphænoid, 1800s sphenoïd. Etymology: < modern Latin sphēnoidēs, sphēnoeidēs (†sphæno- ), < Greek σϕηνοειδής , < σϕήν wedge: see -oid suffix. So French sphénoïde (1611). A. adj. sphenoid bone n. a bone of irregular form situated at the base of the skull, where it is wedged in between the other bones of the cranium. ΘΚΠ the world > life > the body > structural parts > bone or bones > skull > parts of skull > [noun] > sphenoid bone wedge-bone1615 sphenoidal bone1726 sphenoid bone1732 sphenoid1828 1732 A. Monro Anat. (ed. 2) 76 I have seen separate..Bones at the Conjunction..of the sphenoid and parietal Bones. 1768 Philos. Trans. 1767 (Royal Soc.) 57 119 Portions of medullary substance lying upon the sphænoid bone. 1831 R. Knox tr. H. Cloquet Syst. Human Anat. (ed. 2) 41 The sphenoid bone is articulated with the frontal, ethmoid, occipital, parietal, and temporal bones. 1884 M. Mackenzie Man. Dis. Throat & Nose II. 232 The posterior third of the roof..is formed by the body of the sphenoid bone. B. n. 1. Anatomy. The sphenoid bone; one or other of the separate parts of this. ΘΚΠ the world > life > the body > structural parts > bone or bones > skull > parts of skull > [noun] > sphenoid bone wedge-bone1615 sphenoidal bone1726 sphenoid bone1732 sphenoid1828 1828 J. Stark Elements Nat. Hist. I. 28 In the fœtus the occiput is divided into four parts, the body of the sphenoid into two. 1841 T. R. Jones Gen. Outl. Animal Kingdom xxx. 638 These two halves may..be called, respectively, the anterior and posterior sphenoids. 1896 J. W. Kirkaldy & E. C. Pollard tr. J. E. V. Boas Text Bk. Zool. 362 In the basal and lateral regions in front of the parts just mentioned are the sphenoids (ali-, orbito-, and basi-shenoid). 2. Crystallography. A wedge-shaped crystal bounded by four equal and similar triangular faces. ΘΚΠ the world > matter > chemistry > crystallography (general) > crystal (general) > specific crystal forms > [noun] tripyramid1828 trisoctahedron1837 fluoroid1850 sphenoid1855 discalenohedron1872 prism1878 tetrakis-hexahedron1878 galenoid1882 macroprism1883 semi-form1895 tetartohedron1895 tetrakisdodecahedron1895 trichite1900 1855 D. T. Ansted et al. in Orr's Circle Sci.: Inorg. Nature 435 The Rhombic Sphenoid, or, Irregular Tetrahedron, is a hemihedral form, derived from the double four-faced rhombic pyramid. 1855 D. T. Ansted et al. in Orr's Circle Sci.: Inorg. Nature 435 A sphenoid may be derived from every one of the pyramids previously described. 1878 H. P. Gurney Crystallogr. 78 A closed figure bounded by four similar isosceles triangles..is sometimes called a sphenoid. This entry has not yet been fully updated (first published 1914; most recently modified version published online March 2022). < adj.n.1732
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