ges-hun-dite noun /ges-hoon-dite/ 1. In geology, the mineral geshundite. Typically found in the elbow pit area of a sleeve where a sneeze has been directed. 2. The particulate matter resulting from a sneeze once the liquid portion has evaporated. 3. The sedimentary rock geshundite. Dust from the mining of geshundite is known to make people sneeze. Why in the world this stuff is mined is beyond me. People engage in so many inexplicable activities.