Usage History of 'isotonic'

The following chart shows how frequently 'isotonic' appeared in printed materials over time. For example, the word 'isotonic' occurred 2 times in books in 1821 and 11,003 times in 2008. From 1821 to 2008, the word 'isotonic' was used a total of 597,326 times in books scanned by Google. See Reference: Google Ngram project.

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