Usage History of 'photochromism'

The following chart shows how frequently 'photochromism' appeared in printed materials over time. For example, the word 'photochromism' occurred 4 times in books in 1945 and 168 times in 2008. From 1945 to 2008, the word 'photochromism' was used a total of 13,455 times in books scanned by Google. See Reference: Google Ngram project.

See also:

Find all anagrams of 'photochromism'
Words starting with a,b,c...
Words ending with a,b,c...
Words starting & ending with a,b,c....