Protoscience refers to historical philosophical disciplines which existed prior to the development of scientific method, which allowed them to develop into science proper (see prescientific). A standard example is that of alchemy which later became chemistry, or that of astrology which later became astronomy.
By extension, "protoscience" may be used in reference to any "set of beliefs or theories that have not yet been tested adequately by the scientific method but which are otherwise consistent with existing science, [thus being] a new science working to establish itself as legitimate science".[1]
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