1. 
   olfact
   (ol´fakt) a unit of odor, the minimal perceptible odor, being the minimal concentration of a substance in solution that can be perceived by a large number of normal individuals, expressed in terms of grams per liter.
   Found op http://www.encyclo.co.uk/local/21001
   
   
2. 
   olfact
   olfact A unit of odor, the minimum perceptible odor, being the minimum concentration of a substance in solution which can be perceived by a large number of normal individuals, expressed in terms of grams per liter.
   Found op http://www.wordinfo.info/words/index/info/view_unit/1459/
   
   

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