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

plural of neutron drip line

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

Many minor influences gradually produce a significant effect.

(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.

plural of dripstone

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tube installed vertically in the bottoms of fuel tanks of many large aircraft, used to check fuel levels; now mostly superseded by the floatstick.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