• Webster's Revised Unabridged Dictionary
    • n Thomsonianism (Med) An empirical system which assumes that the human body is composed of four elements, earth, air, fire, and water, and that vegetable medicines alone should be used; -- from the founder, Dr. Samuel Thomson, of Massachusetts.
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Century Dictionary and Cyclopedia
    • n thomsonianism The principles of the Thomsonian school.
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In literature:

We are living, not in a Newtonian, but at the beginning of a perhaps still greater Thomsonian era.
"Scientific American Supplement, No. 717, September 28, 1889" by Various
These savages are what you call Thomsonians I suppose.
"Adrift in the Wilds" by Edward S. Ellis
Page had some reputation as a (Thomsonian) physician.
"Fifty Years In The Northwest" by William Henry Carman Folsom
We must not neglect to state that the library is especially rich in books pertaining to the American Eclectics and Thomsonians.
"Etidorhpa or the End of Earth." by John Uri Lloyd
The views of the Thomsonian as to heat and cold appear to me unphilosophical.
"Fruits of Philosophy" by Charles Knowlton
How long this taste for landscape had existed in pre-Thomsonian days it does not fall to us to determine.
"Garden-Craft Old and New" by John D. Sedding

In news:

Robert Thomson writes a typically Thomsonian memo this afternoon — guess what he uses the word panglossian.