Dengue

Dengue, a disease peculiar to the tropics, occurs in hot weather, and attacks one suddenly with high fever and violent pains, and after a relapse returns in a milder form and leaves the patient very weak.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Dendera * Denham, Dixon
[wait for the fun]
Demogorgon
Demoivre, Abraham
Demon
De Morgan, Augustus
Demosthenes
Dempster, Thomas
Denarius
Denbigh
Denbighshire
Dendera
Dengue
Denham, Dixon
Denham, Sir John
Denina, Carlo
Denis
Denis, St.
Denis, St.
Denison, Edward
Denison, George Anthony
Denison, John Evelyn
Denman, Lord