from
The Collaborative International Dictionary of English v.0.48
Vertigo \Ver"ti*go\ (?; 277), n.; pl. E. {Vertigoes}, L.
{Vertigines}. [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.
--Quain.
[1913 Webster]
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.
[1913 Webster]