or Ca·lip·pus, Cal·lip·us
flourished 4th century b.c., Greek astronomer.
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Examples from the Web for callippus
Historical Examples of callippus
This is no more the case than that the spheres of Eudoxus and Callippus were supposed to be real.History of Astronomy
Similarly in astronomy, Aristotle used the assistance of Eudoxus and Callippus.