a. Obs. rare. [f. L. verticill-us VERTICILLUS: see -ARY.] Of motion: Rotatory, whirling, vertiginous.
1757. E. Darwin, in Phil. Trans., L. 247. The verticillary motion given to charcoal-dust thrown on nitre in fusion. Ibid. (1794–6), Zoon. (1801), III. 145. When the legs are straight, as in standing erect, there is no verticillary motion in the knee-joint.
