freeze drying

名词 freeze drying:

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
   同义词：freeze-drying, lyophilization, lyophilisation

动词 freeze dry:

1. preserve by rapid freezing and subsequently drying in a vacuum
   同义词：freeze-dry