Definition of photochromic in English:


Syllabification: pho·to·chro·mic
Pronunciation: /ˌfōtəˈkrōmik


(Of a substance) undergoing a reversible change in color or shade when exposed to light of a particular frequency or intensity: photochromic sunglasses
More example sentences
  • When a photochromic material is exposed to light, the light absorption properties of the material change.
  • Also, photochromic substances can be restored to their original state after being in the dark for a period of time.
  • This reversible deprotonation and reprotonation causes the distinguished visible and fully reversible photochromic shift from purple to yellow.


1950s: from photo- 'relating to light' + Greek khrōma 'color' + -ic.



Pronunciation: /-ˈkrōmizəm/
More example sentences
  • Nagamura et al. have reported photochromism of the ion pair-charge transfer complexes of viologen derivatives with tetrakis [3,5-bis phenyl] borate as a counter anion.
  • Investigations of the spiro [cyclohexadiene-indolines] revealed the photochromism to be highly solvent dependent.
  • The wide interest for basic and applied research on photochromism in the last decade is well documented by two monographs.

Definition of photochromic in:

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