| pitting [`pid·iŋ] MEDICINE 1. The formation of pits; in the fingernails, a consequence and sign of psoriasis. 2. The preservation for a short time of indentations on the skin made by pressing with the finger; seen in pitting edema. METALLURGY Selective localized formation of rounded cavities in a metal surface due to corrosion or to nonuniform electroplating. MINING ENGINEERING The act of digging or sinking a pit. |