Distillation in high vacuum, intended to make possible use of low temperatures to minimise damage to thermally labile molecules that would be decomposed by boiling at higher temperatures. ... (05 Mar 2000) ... 
Type: Term Definitions: 1. distillation in high vacuum, intended to make possible use of low temperatures to minimize damage to thermally labile molecules that would be decomposed by boiling at higher temperatures.
a vacuum distillation in which the molecules of the distillate reach the condenser before colliding with one another.