The removal of the surface layer, membrane, or fibrous cover of anything(noun)
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Use "decortication" in a sentence
"GUPTA: Theoretically, it could, but this procedure, called decortication, actually removes not only the scar tissue, but the layer of tissue around the lung that causes scarring in the first place."
"The operation is called a decortication pleurectomy, and was done while one lung was deflated and a tube was inserted to ventilate the other."
"This process is known as decortication and, as well as raising the oil content of the raw material entering the extraction machinery, it ensures a higher protein content in the oil-cake."