Ver"ti*go . [L., fr. vertere to turn. See Verse.]
1. Med.
Dizziness or swimming of the head; an affection of the head in which objects, though stationary, appear to move in various directions, and the person affected finds it difficult to maintain an erect posture; giddiness.
Quian.
2. Zool.
Any one of numerous species of small land snails belonging to the genus Vertigo, having an elongated or conical spiral shell and usually teeth in the aperture.
© Webster 1913.