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celery root
celesta
celestial
celestial body
celestial coordinates
celestial equator
celestial globe
celestial horizon
celestial mechanics
celestial navigation
celestial pole
celestial sphere
celestite
celiac
celiac disease
celibate
cell (1)
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celestial mechanics
ce·les·tial me·chan·ics


noun 
Definition:
 
mechanics of bodies in orbit: the branch of astronomy concerned with the motions and positions of astronomical objects in gravitational fields ( takes a singular verb )

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