lyophilization

n. (Biochemistry) freeze-drying, dry blood plasma or other biological substances by freezing in a vacuum (also lyophilisation)

Freeze drying (also known as lyophilization) is a dehydration process typically used to preserve a perishable material or make the material more convenient for transport. Freeze drying works by freezing the material and then reducing the surrounding pressure and adding enough heat to allow the frozen water in the material to sublime directly from the solid phase to gas.
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Lyophilization /ly·oph·i·li·za·tion/ the creation of a stable preparation of a biological substance by rapid freezing and dehydration of the frozen [more]Lyophilization - Community and Resources

Noun
1. a method of drying food or blood plasma or pharmaceuticals or tissue without destroying their physical structure; material is frozen and then warmed in a vacuum so that the ice sublimes
(synonym) freeze-drying, lyophilisation
(hypernym) freeze, freezing
(derivation) lyophilize, lyophilise

freeze-drying.