1. 
   LCN
   abbreviation: load classification number
   Found op http://www.apscharts.com/abbrev.html
   
   
2. 
   Lcn
   The concentration of a toxicant lethal to n% of a test population.
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
3. 
   LCn
   This abbreviation is used for the exposure concentration of a toxicant lethal to n% of a test population. See median lethal concentration.
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
4. 
   lcn
   1) Abbreviation
   Found op load classification number
   
   

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