Columbia Encyclopedia

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astrolabe

(Encyclopedia)astrolabe ăsˈtrəlāb [key], instrument probably used originally for measuring the altitudes of heavenly bodies and for determining their positions and movements. Although its origin is ancient and ...

Greek literature, ancient

(Encyclopedia)Greek literature, ancient, the writings of the ancient Greeks. The Greek Isles are recognized as the birthplace of Western intellectual life. The next period of Greek literature reached its zenith i...

mathematics

(Encyclopedia)mathematics, deductive study of numbers, geometry, and various abstract constructs, or structures; the latter often “abstract” the features common to several models derived from the empirical, or ...

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