1. [syn: semicircle, hemicycle]
The Collaborative International Dictionary of English v.0.48:
Semicircle \Sem"i*cir`cle\, n.
(a) The half of a circle; the part of a circle bounded by
its diameter and half of its circumference.
(b) A semicircumference.
2. A body in the form of half of a circle, or half of a
3. An instrument for measuring angles.
WordNet (r) 3.0 (2006):
n 1: a plane figure with the shape of half a circle [syn:
Moby Thesaurus II by Grady Ward, 1.0:
22 Moby Thesaurus words for "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