semicircularadj.

/sɛmɪˈsəːkjʊlə/

Forms: Also Middle English -er.

Etymology: < medieval Latin sēmicirculāris, < Latin sēmicirculus semicircle n. Compare French semi-circulaire.

a. Of the form of a semicircle.

ΘΚΠ

the world > space > shape > curvature > roundness > [adjective] > circular > semicircular

semicircular?a1475

semicircled1590

hemicircular1656

half-round1662

semicirculatinga1700

demi-circular1821

?a1475 (?a1425) tr. R. Higden Polychron. (Harl. 2261) (1872) IV. 101 After auctores theatrum is proprely a flore semicirculer, in the myddes of whom was an howse whiche was callede scena.

1615 H. Crooke Μικροκοσμογραϕια 984 The figure of the ribs is semicircular like a Bow.

1624 H. Wotton Elements Archit. i. 50 Semicircular Arches, or Hemisphericall Vaults, being raised vpon the totall Diameter.

1708 J. Chamberlayne Magnæ Britanniæ Notitia (1710) 417 The Lords..when in the Inner House sit on a Semicircular Bench..to hear Petitions.

1776 E. Gibbon Decline & Fall I. xi. 300 Disposing the legions in a semicircular form, he advanced the two horns of the crescent across the Danube.

1864 J. Bryce Holy Rom. Empire iii. 23 Behind in the semicircular apse sat the clergy, rising tier above tier.

a1878 G. G. Scott Lect. Mediæval Archit. (1879) I. 49 The arches [in the Romanesque style] always either semi-circular or segmental.

in combination.1766 Compl. Farmer at Mouldiness Two twigs of ozier put semicircular-wise into holes made in the handle of the scythe.1845 J. Narrien Archit. in Encycl. Metrop. V. 284/2 Semicircular-headed apertures serving as entrances.1897 Church Times 20 Aug. 186/1 Small semicircular-headed windows of one light.

b. Anatomy. Designating †(a) the orbicular muscle of the eyelid; (b) the three canals of the internal ear.

ΚΠ

1706 Phillips's New World of Words (new ed.) Semicircular Muscles, the same as Claudent Muscles.

1749 D. Hartley Observ. Man i. ii. §5. 224 Vibrations communicated to the Cochlea, and semicircular Canals.

1844 W. B. Carpenter Animal Physiol. xi. 392 The three semicircular canals are passages, excavated in the solid bone, and lined by a continuation of the same membrane as that which lines the vestibule [of the ear].

1885 Encycl. Brit. XIX. 38/2 The horizontal semicircular canal in the internal ear of a pigeon.

Derivatives

semicircuˈlarity n.

ΘΚΠ

the world > space > shape > curvature > roundness > [noun] > circularity > semicircularity

semicircularity1863

1863 C. Reade Hard Cash i Observing his semicircularity and general condition.

semiˈcircularness n.

ΚΠ

1731 N. Bailey Universal Etymol. Eng. Dict. (ed. 5) Semicircularness, half circularness.

This entry has not yet been fully updated (first published 1911; most recently modified version published online December 2020).

单词	semicircular
释义	semicircularadj. /sɛmɪˈsəːkjʊlə/ Forms: Also Middle English -er. Etymology: < medieval Latin sēmicirculāris, < Latin sēmicirculus semicircle n. Compare French semi-circulaire. a. Of the form of a semicircle. ΘΚΠ the world > space > shape > curvature > roundness > [adjective] > circular > semicircular semicircular?a1475 semicircled1590 hemicircular1656 half-round1662 semicirculatinga1700 demi-circular1821 ?a1475 (?a1425) tr. R. Higden Polychron. (Harl. 2261) (1872) IV. 101 After auctores theatrum is proprely a flore semicirculer, in the myddes of whom was an howse whiche was callede scena. 1615 H. Crooke Μικροκοσμογραϕια 984 The figure of the ribs is semicircular like a Bow. 1624 H. Wotton Elements Archit. i. 50 Semicircular Arches, or Hemisphericall Vaults, being raised vpon the totall Diameter. 1708 J. Chamberlayne Magnæ Britanniæ Notitia (1710) 417 The Lords..when in the Inner House sit on a Semicircular Bench..to hear Petitions. 1776 E. Gibbon Decline & Fall I. xi. 300 Disposing the legions in a semicircular form, he advanced the two horns of the crescent across the Danube. 1864 J. Bryce Holy Rom. Empire iii. 23 Behind in the semicircular apse sat the clergy, rising tier above tier. a1878 G. G. Scott Lect. Mediæval Archit. (1879) I. 49 The arches [in the Romanesque style] always either semi-circular or segmental. in combination.1766 Compl. Farmer at Mouldiness Two twigs of ozier put semicircular-wise into holes made in the handle of the scythe.1845 J. Narrien Archit. in Encycl. Metrop. V. 284/2 Semicircular-headed apertures serving as entrances.1897 Church Times 20 Aug. 186/1 Small semicircular-headed windows of one light. b. Anatomy. Designating †(a) the orbicular muscle of the eyelid; (b) the three canals of the internal ear. ΚΠ 1706 Phillips's New World of Words (new ed.) Semicircular Muscles, the same as Claudent Muscles. 1749 D. Hartley Observ. Man i. ii. §5. 224 Vibrations communicated to the Cochlea, and semicircular Canals. 1844 W. B. Carpenter Animal Physiol. xi. 392 The three semicircular canals are passages, excavated in the solid bone, and lined by a continuation of the same membrane as that which lines the vestibule [of the ear]. 1885 Encycl. Brit. XIX. 38/2 The horizontal semicircular canal in the internal ear of a pigeon. Derivatives semicircuˈlarity n. ΘΚΠ the world > space > shape > curvature > roundness > [noun] > circularity > semicircularity semicircularity1863 1863 C. Reade Hard Cash i Observing his semicircularity and general condition. semiˈcircularness n. ΚΠ 1731 N. Bailey Universal Etymol. Eng. Dict. (ed. 5) Semicircularness, half circularness. This entry has not yet been fully updated (first published 1911; most recently modified version published online December 2020). < adj.?a1475
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