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semicircle

noun [C usually singular]
 
 
/ˈsem.iˌsɜː.kl̩/ US  /-ˌsɝː-/

Definition

half a circle: We arranged the chairs in a semicircle.Geometrical shapesSpherical, circular and annular objects semicircular
 
 
/ˌsem.iˈsɜː.kjʊ.lər/ US  /-ˈsɝː.kjʊ.lɚ/ adjective
The chairs were placed in a semicircular arrangement.Geometrical shapesSpherical, circular and annular objects
(Definition of semicircle noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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