calenture
/ˈkal(ə)ntjʊə
/noun [mass noun]
Feverish delirium formerly thought of as afflicting sailors in the tropics.The crowning description of the illness called calenture is in Herman Melville's novel Moby Dick.
Origin
Late 16th century: from French, from Spanish calentura 'fever', from calentar 'be hot', based on Latin calere 'be warm'.