a quo

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
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.
    

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