Answer:
The ā medical abbreviation means before.
Step-by-step explanation:
The ā (a with bar over it, coming from the Latin word "ante")
An example would be:
Omeprazole 40 mg/tab, 1 tab po od ā.am meal
Take 1 tab of Omeprazole 40 mg once a day before AM meal or breakfast.
But the use of a.c. (before meals) or q.a.m. (every morning) is more acceptable.
"ante" is used as a prefix to indicate "before" or "in front of" as in antecedent and antique.