Collodion

n.
  1. A solution of pyroxylin (soluble gun cotton) in ether containing a varying proportion of alcohol. It is strongly adhesive, and is used by surgeons as a coating for wounds; but its chief application is as a vehicle for the sensitive film in photography.
    2. Collodion process (Photog.),
    a process in which a film of sensitized collodion is used in preparing the plate for taking a picture.
    Styptic collodion ,
    collodion containing an astringent, as tannin.