GNU Collaborative International Dictionary of English

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1.       
   Freeze-dry (frēz-drī), v. t. [imp. & p. p. Freeze-dried; p. pr. & vb. n. Freeze-drying.] to remove the moisture from (e.g. food) by first freezing and then subjecting to a high vacuum; -- used as a mild method for drying foods or chemicals while causing little decomposition, in contrast to heat-drying.  This is a relatively gently drying process used to preserve food or sensitive biological materials.  For biochemical materials, the term lyophilize is often used.
   
   [PJC]