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circumstantiate
circumstellar
circumterrestrial
circumvallate
circumvent
circumvolution
circus
circus catch
Circus Maximus
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cire perdue
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circumpolar star
cir·cum·po·lar star (plural cir·cum·po·lar stars)


noun 
Definition:
 
permanently visible star: a star that is always visible above the horizon at a given latitude
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