Obs. [ad. L. circumactiōn-em, n. of action f. circumagĕre: see prec.] Communication of circular motion; moving round.
1578. Banister, Hist. Man, I. 4. All kynde of motions … as Extension, Contraction, Circumaction.
1615. Crooke, Body of Man, 813. Helpe the circumaction or compassing of the thigh.
1667. Waterhouse, Fire Lond., 162. Trade being like a Scale, in motion up and down, the circumaction of it … is the life of it.
