i think we add acid into a base,as we can observe it in the titration process.....
Simply put, an acid donates protons ( H + ) to solutions and bases accept protons in solutions.
The clue is in the name, Stomach acid is an acid. It is Hydrochloric Acid with a pH of 2
The definition of an acid is commonly known as a substance which can produce hydrogen ions (Hydronium ions to be more precise) in solution. However, the currently more 'correct definition' of an acid...
I'm pretty sure it is an acid considering it is called 'brig acid'