Also found in: Dictionary, Thesaurus, Legal, Encyclopedia.
a preparation in which the hollow parts such as ducts, vessels, or alveoli of the lung are filled with a substance that hardens and persists after dissolving the tissues by digestion.
In anatomical and pathology investigations, hollow organs and structures such as vessels are filled with a liquid substance that hardens. Then the surrounding tissues are dissolved by use of suitable chemicals. This leaves a cast of the structures.
See also: preparation