from The American Heritage® Dictionary of the English Language, 5th Edition.
- Greek astronomer who was among the first to propose that the sun is the center of the universe and that the earth moves around the sun.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an ancient Greek astronomer who was one of the first to propose a heliocentric theory of the universe (circa 270 BC)
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