A QUO, A Latin phrases which signifies from which; example, in the computation of time, the day a quo is not to be counted, but the day ad quem is always included. 13 Toull. n. 52 ; 2 Duv. n. 22. A court a quo, the court from which an appeal has been taken; a judge a quo is a judge of a court below. 6 Mart. Lo. R. 520; 1 Har. Cond. L. R. 501. See Ad quem.