Calenture

Part of speech: noun (n.)

A name formerly given to various fevers occuring in tropics; esp. to a form of furious delirium accompanied by fever, among sailors, which sometimes led the affected person to imagine the sea to be a green field, and to throw himself into it.

Part of speech: verb (v.)

To see as in the delirium of one affected with calenture. [Poetic] Hath fed on pageants floating through the air Or calentures in depths of limpid flood. Wordsworth.