Dr. Adolf Zsigmondy, aka Adolph Zsigmondy (24 April 1816 in Pozsony (German: Pressburg), Kingdom of Hungary – 23 June 1880 in Vienna, Austria-Hungary) was a dentist of Hungarian origin who lived in Vienna.
He used sodium-superoxide for widening the root canal and he made permanent fillings of black hard gutta percha.
On the basis of observations carried out on himself he described the two-phase or temporal mastication called after him.
He was also much engaged with professional politics, in his publications he strove for recognition of dentistry as an organic part of medical science.
Both Ottó and Emil Zsigmondy were well-known mountaineers; they took part in the first climb of the Meije by the east arête in July 1885, but Emil was killed on another attempted climb of the Meije the following month.