sagittan.

Brit.

/səˈdʒɪtə/,

/səˈɡɪtə/,

/ˈsadʒᵻtə/, U.S.

/səˈdʒɪdə/,

/ˈsædʒədə/

Etymology: Latin, lit. an arrow.

1. Astronomy. A northern constellation lying between Hercules and Delphinus: = arrow n. 4.In modern dictionaries.

ΘΚΠ

the world > the universe > constellation > Northern constellations > [noun] > Sagitta

arrow1550

sagitta1704

1704 in J. Harris Lexicon Technicum I.

2. Geometry.

a. The versed sine of an arc: = arrow n. 6.

ΘΚΠ

the world > relative properties > number > geometry > [noun] > branches of > trigonometry > functions of > versed sine

shaft1552

versed sine1581

arrow1594

sagitta1675

co-versed sine1706

verse-sine1772

suversed sine1782

versina1831

1594 T. Blundeville Exercises ii. 10 Sinus versus..is also called in Latine Sagitta; in English a Shaft or Arrow, for the Demonstrative figure thereof..is not unlike to the string of a bow ready bent, having a Shaft in the middest thereof.]

1675 J. Collins Let. 10 Apr. in H. Oldenburg Corr. (1977) XI. 255 If you give the Radius R and the Versed Sine or Sagitta a and would find the Area of the Segment cutt off by the Chord line [etc.].

1704 in J. Harris Lexicon Technicum I.

1726 G. Leoni tr. L. B. Alberti Architecture I. 9/2 The..Line..from the middle Point of the Chord up to the Arch, leaving equal Angles on each Side, is call'd the Sagitta.

1853 H. Douglas Ess. Mil. Bridges (ed. 3) ii. 32 The sagitta, or versed sine, of the curvature being about one fifth of the side of the triangle.

†b. In extended sense: The abscissa of a curve. Obsolete. rare.Apparently only attested in dictionaries or glossaries.

ΚΠ

1728 E. Chambers Cycl. Sagitta, in Geometry, a Term..for the Abscisse of a Curve.

3. Architecture. The key-stone of an arch.

ΘΚΠ

society > leisure > the arts > visual arts > architecture > arch > [noun] > parts of > keystone

key1608

keystonea1637

key-piece1669

sagitta1703

key block1823

1703 R. Neve Builder's Dict. (1736)

1823 P. Nicholson New Pract. Builder 592.

1850 J. Weale Rudim. Dict. Terms Archit. iii. 386/1 Sagitta, in architecture, a name sometimes used for the key-piece of an arch.

4. The middle horizontal stroke in the Greek letter ε. [Apparently an application of sense 2]

ΘΚΠ

society > communication > writing > handwriting or style of > formation of letters > [noun] > part of letter > in Greek

sagitta1864

1864 Ellicott Pastoral Ep. (ed. 3) 103 The thickened extremity of the sagitta of ε.

1881 Dublin Rev. 6 134 The disputed line is really the sagitta of an epsilon.

Categories »

5. Anatomy. ‘The sagittal suture’ ( Cent. Dict. 1891).

6. Zoology.

a. One of the otoliths of a fish's ear.

ΚΠ

1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 86 There are [in the ear of the perch] generally two large otoliths, a sagitta in the sacculus, an asteriscus in the recessus cochleae.

1897 T. J. Parker & W. A. Haswell Text-bk. Zool. II. 199.

b. One of the components of certain sponge-spicules: see quot. 1898.

ΚΠ

1898 A. Sedgwick Student's Text-bk. Zool. I. 83 The Triæne consists of the rhabdome, or shaft, and the cladome, which consists of the three cladi, a straight line joining the ends of the two cladi is the chord. The sagitta is a perpendicular from the origin of the cladome to the chord.

This entry has not yet been fully updated (first published 1909; most recently modified version published online June 2022).

单词	sagitta
释义	sagittan. Brit. /səˈdʒɪtə/, /səˈɡɪtə/, /ˈsadʒᵻtə/, U.S. /səˈdʒɪdə/, /ˈsædʒədə/ Etymology: Latin, lit. an arrow. 1. Astronomy. A northern constellation lying between Hercules and Delphinus: = arrow n. 4.In modern dictionaries. ΘΚΠ the world > the universe > constellation > Northern constellations > [noun] > Sagitta arrow1550 sagitta1704 1704 in J. Harris Lexicon Technicum I. 2. Geometry. a. The versed sine of an arc: = arrow n. 6. ΘΚΠ the world > relative properties > number > geometry > [noun] > branches of > trigonometry > functions of > versed sine shaft1552 versed sine1581 arrow1594 sagitta1675 co-versed sine1706 verse-sine1772 suversed sine1782 versina1831 1594 T. Blundeville Exercises ii. 10 Sinus versus..is also called in Latine Sagitta; in English a Shaft or Arrow, for the Demonstrative figure thereof..is not unlike to the string of a bow ready bent, having a Shaft in the middest thereof.] 1675 J. Collins Let. 10 Apr. in H. Oldenburg Corr. (1977) XI. 255 If you give the Radius R and the Versed Sine or Sagitta a and would find the Area of the Segment cutt off by the Chord line [etc.]. 1704 in J. Harris Lexicon Technicum I. 1726 G. Leoni tr. L. B. Alberti Architecture I. 9/2 The..Line..from the middle Point of the Chord up to the Arch, leaving equal Angles on each Side, is call'd the Sagitta. 1853 H. Douglas Ess. Mil. Bridges (ed. 3) ii. 32 The sagitta, or versed sine, of the curvature being about one fifth of the side of the triangle. †b. In extended sense: The abscissa of a curve. Obsolete. rare.Apparently only attested in dictionaries or glossaries. ΚΠ 1728 E. Chambers Cycl. Sagitta, in Geometry, a Term..for the Abscisse of a Curve. 3. Architecture. The key-stone of an arch. ΘΚΠ society > leisure > the arts > visual arts > architecture > arch > [noun] > parts of > keystone key1608 keystonea1637 key-piece1669 sagitta1703 key block1823 1703 R. Neve Builder's Dict. (1736) 1823 P. Nicholson New Pract. Builder 592. 1850 J. Weale Rudim. Dict. Terms Archit. iii. 386/1 Sagitta, in architecture, a name sometimes used for the key-piece of an arch. 4. The middle horizontal stroke in the Greek letter ε. [Apparently an application of sense 2] ΘΚΠ society > communication > writing > handwriting or style of > formation of letters > [noun] > part of letter > in Greek sagitta1864 1864 Ellicott Pastoral Ep. (ed. 3) 103 The thickened extremity of the sagitta of ε. 1881 Dublin Rev. 6 134 The disputed line is really the sagitta of an epsilon. Categories » 5. Anatomy. ‘The sagittal suture’ ( Cent. Dict. 1891). 6. Zoology. a. One of the otoliths of a fish's ear. ΚΠ 1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 86 There are [in the ear of the perch] generally two large otoliths, a sagitta in the sacculus, an asteriscus in the recessus cochleae. 1897 T. J. Parker & W. A. Haswell Text-bk. Zool. II. 199. b. One of the components of certain sponge-spicules: see quot. 1898. ΚΠ 1898 A. Sedgwick Student's Text-bk. Zool. I. 83 The Triæne consists of the rhabdome, or shaft, and the cladome, which consists of the three cladi, a straight line joining the ends of the two cladi is the chord. The sagitta is a perpendicular from the origin of the cladome to the chord. This entry has not yet been fully updated (first published 1909; most recently modified version published online June 2022). < n.1675
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