1. 
   scotochromogenic
   scotochromogen, scotochromogenic 1. A strain of mycobacteria that can form pigment with or without light. 2. Any microorganism that produces pigment when grown without light as well as with light.
   Found op http://www.wordinfo.info/words/index/info/view_unit/1917/
   
   
2. 
   Scotochromogenic
   Scotochromogenic bacteria develop pigment in the dark or in the light. Runyon Group II nontuberculous mycobacteria are examples but the term could apply to many other organisms. ...
   Found op http://en.wikipedia.org/wiki/Scotochromogenic
   
   

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