stillicidium

Noun

 * 1)  A morbid trickling.
 * 2)  An urban servitude in Ancient Rome, where a proprietor was not allowed to build to the extremity of his estate, but must leave a space regulated by the charter by which the property was held, so as not to throw the eavesdrop on the land of his neighbour.

Etymology
From.

Noun

 * 1) liquid (especially rainwater) falling drop by drop