Category: S

A surgical instrument for cutting a sphincter.  

Inspection of the internal anal sphincter. The internal anal sphincter is covered by anodermal and mucous membrane tissues that cannot be seen unless exposed surgically.  

An instrument for inspection of the anal sphincter.  

Freeing of the iris from the cornea in anterior synechia affecting only the pupillary border.  

A spasm of the sphincter ani muscles.  

The smooth muscle encircling the pancreatic duct just before it joins the ampulla.  

The smooth muscle investing the common bile duct just before its junction with the pancreatic duct; a part of the sphincter of Oddi.  

A sphincter that closes the anus, composed of two parts: the external one being of striated muscle, the internal one, of smooth muscle.  

In bacteriology, the cell and partial cell wall remaining after the organism’s cell-wall synthesis has been prevented. Spheroplasts may be formed when synthesis of the cell wall is prevented by the action of certain chemicals, e.g., penicillin, while cells are growing.  

A device to ascertain the curvature of a surface.