1. 
   Non-drying oil
   A non-drying oil is an oil which does not harden when it is exposed to air. This is as opposed to a to drying oil, which hardens completely, or a semi-drying oil, which partially hardens. Oils with an iodine number of less than 115 are considered non-drying. ==Examples of non-drying oils== ...
   Found op http://en.wikipedia.org/wiki/Non-drying_oil
   
   
2. 
   nondrying oil
   a type of fixed oil that does not harden but rather remains sticky to the touch indefinitely when exposed in a thin film to air.
   Found op http://www.encyclo.co.uk/local/21001
   
   

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