What is Calling The Jury?

Legal Definition
Successively drawing out of a box into which they have been previously put the names of the jurors on the panels annexed to the nisi prius record, and calling them over in the order in which they are so drawn. The twelve persons whose names are first cniled, and who appear, are sworn as the jury, unless some just cause of challenge or excuse, with respect to any of them, shall be brought forward.
-- Black's Law Dictionary
Legal Definition
Calling off the names of veniremen for jury duty.
-- Ballentine's Law Dictionary