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

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

(physics) The jagged line, on a chart showing the number of protons and neutrons of all known isotopes, beyond which neutron-rich nuclei are unstable and emit neutrons.

Many minor influences gradually produce a significant effect.

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.

plural of dripstick

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tube installed vertically in the bottoms of fuel tanks of many large aircraft, used to check fuel levels; now mostly superseded by the floatstick.