semicircle

• POS: Noun
• HYPHEN: sem=i=cir=cle

CIDE DICTIONARY

semicircle, n. 

•  The half of a circle; the part of a circle bounded by its diameter and half of its circumference.  [1913 Webster]
•  A body in the form of half of a circle, or half of a circumference.  [1913 Webster]
•  An instrument for measuring angles.  [1913 Webster]

OXFORD DICTIONARY

semicircle, n.
1 half of a circle or of its circumference.
2 a set of objects ranged in, or an object forming, a semicircle.

Etymology

L semicirculus (as SEMI-, CIRCLE)

THESAURUS

semicircle

crescent, crescent moon, fifty percent, fifty-fifty, half, half circle, half-and-half, half-moon, hemicycle, hemisphere, horseshoe, lunula, lunule, mediety, meniscus, moiety, quadrant, scythe, sector, semisphere, sextant, sickle

ROGET THESAURUS

semicircle

Circularity

N circularity, roundness, rotundity, circle, circlet, ring, areola, hoop, roundlet, annulus, annulet, bracelet, armlet, ringlet, eye, loop, wheel, cycle, orb, orbit, rundle, zone, belt, cordon, band, contrate wheel, crown wheel, hub, nave, sash, girdle, cestus, cincture, baldric, fillet, fascia, wreath, garland, crown, corona, coronet, chaplet, snood, necklace, collar, noose, lasso, lassoo, ellipse, oval, ovule, ellipsoid, cycloid, epicycloid, epicycle, semicircle, quadrant, sextant, sector, sphere, round, rounded, circular, annular, orbicular, oval, ovate, elliptic, elliptical, egg-shaped, pear-shaped, cycloidal, spherical, I watched the little circles die.