geocentric theory

the theory, attributed to Alexandrian astronomer, geographer, and mathematician Ptolemy (2nd century ce), that the earth is the center of the universe and that the heavenly bodies move around it. Also called Ptolemaic theory. Compare heliocentric theory.

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Psychology term of the day

May 8th 2024

morals

pl. n. the ethical values or principles that people use to guide their behavior. See also moral; morality.