Anat. [L. vermis worm.] The vermiform process of the cerebellum.
1890. Cent. Dict., Postvermis, the vermis inferior of the cerebellum. Ibid., Prevermis, the anterior and prominent part of the vermis of the cerebellum.
1899. Allbutts Syst. Med., VII. 365. In one [case of cerebellar atrophy] the vermis was less affected by atrophy than the hemispheres.