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.
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.
© Webster 1913.