barium meal

noun3

1. •
   A preparation of barium sulfate (a radioopaque compound) which the patient ingests for the purpose of producing clear radiographs of the esophagus, stomach, and duodenum.
2. •
   A diagnostic procedure based on observing the barium meal's progress in the digestive tract.
3. •
   (figurative) The deliberate release of traceable information to a suspect to see whether they leak it.

   • The example of Oswald will show how the different operations of a dangle and a barium meal would work more efficiently together. — 2017