What does the medical abbreviation po tid ac mean?

I think this is a combination of P.O. plus t.i.d. plus a.c., which is:

p.o. = by mouth, orally (from "per os," by mouth)

t.i.d. = three times a day (from "ter in die," 3 times a day)

a.c. = before meals (from "ante cibum," before meals)