|a gadget; dingus; thingumbob.|
|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
|1.||(of the lower jaw) projecting beyond the upper jaw; underhung|
|2.||See overshot (of a water wheel) driven by a flow of water that passes under the wheel rather than over it|
undershoot un·der·shoot (ŭn'dər-sh&oomacr;t')
A temporary decrease below the final steady-state value that may occur immediately following the removal of an influence that had been raising that value.