a. [Cf. prec. and -ULAR.] Of motion: Vortical, vorticose.

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1838.  Redfield, in Amer. Jrnl. Sci., XXXIII. 59. Were there no vorticular or whirling action already excited,… there could then be no inequality of pressure to produce rotation.

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1864.  De Penning, Meteorol., 65. This inward vorticular movement can only arise from the constant lateral pressure that is always maintained towards the partial vacuum of the vortex.

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1891.  Atlantic Monthly, LXVIII. 68/2. They [sc. tornadoes] possess truly vorticular motion.

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