|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
|a gadget; dingus; thingumbob.|
|unconformity (ŭn'kən-fôr'mĭ-tē) Pronunciation Key
A surface between successive strata representing a missing interval in the geologic record of time, produced either by an interruption in deposition or by the erosion of depositionally continuous strata followed by renewed deposition. An unconformity is a type of discontinuity.