Drop·ping n.
 1. The action of causing to drop or of letting drop; falling.
 2. pl. That which falls in drops; the excrement or dung of animals; -- often used in the plural.
 Dropping bottle, an instrument used to supply small quantities of a fluid to a test tube or other vessel.
 Dropping fire, a continued irregular discharge of firearms.
 Dropping tube, a tube for ejecting any liquid in drops.

 ◄ ►