from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A science, such as biology, chemistry, or physics, that deals with the objects, phenomena, or laws of nature and the physical world.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A science involved in studying phenomena or laws of the physical world; a general term of physics, chemistry, biology, astronomy, and so on.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun the sciences involved in the study of the physical world and its phenomena
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