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sphere

noun [C] (ROUND OBJECT)
 
 
/sfɪər/ US  /sfɪr/

Definition

an object shaped like a round ball: Doctors have replaced the top of his hip bone with a metal sphere.Spherical, circular and annular objectsGeometrical shapes
(Definition of sphere noun (ROUND OBJECT) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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