(medicine, pathology) The accumulation in the throat or back of the nose of excessive mucus produced by the sinuses.

watery rhinorrhea (runny nose), especially prevalent in the elderly

plural of neutron drip line

Many minor influences gradually produce a significant effect.

(aviation) A thin hollow tube installed vertically in the bottoms of fuel tanks of many large aircraft, used to check fuel levels; now mostly superseded by the floatstick.

plural of dripstick

plural of dripstone

(architecture) A protective moulding over a door or window that allows rain to drip away from the structure. / A water filter in which impurities are removed by running water through a porous stone.