dried by freezing and applying a vacuum; -- used of tissue or blood or serum or other biological substances.

used of tissue or blood or serum or other biological substances; dried by freezing in a high vacuum

preserved by freezing and drying in a vacuum; "freeze-dried coffee"

A soluble coffee prepared by freezing brewed - coffee (concentrate) in a vacuum chamber. This causes the water molecules to crystallize and separate from the coffee flavoring material, which becomes a solid mass.

A method used to dry substances, such as food, to make them last longer. The substance is frozen and then dried in a vacuum.