Dictionary.net

A mild ephemeral or continued fever of tropical countries, often called by the natives of the English-speaking tropics, a "cold"; thermic fever.

The word, in Spanish, signifies fever. A species of furious delirium to which sailors are subject in the torrid zone :-a kind of phrenitis, the attack of which comes on suddenly after a broiling day, and seems to be characterized by a desire in the patient to throw himself into the sea. It is only a variety of phrenitis.