n. 1. The action of causing to drop or of letting drop; falling. [ 1913 Webster ]
2.pl. That which falls in drops; the excrement or dung of animals; -- often used in the plural. [ 1913 Webster ]
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. [ 1913 Webster ]