A thin outer covering of an object
Carmen showered and donned a simple sheath dress and didn't ask Alex what they should wear.
Extracting the cell phone from its sheath, she dialed Alex.
She replaced her knife in its sheath and looked around for more bodies.
The right sheath C (outer process of the ninth abdominal segment-9) is shown in connexion with the guide B formed by the inner processes of the 9th segment.
The epithem is frequently surrounded by a sheath of cuticularized cells.