gizmo

n 1: something whose name is either forgotten or not known [syn:

{dohickey}, {dojigger}, {doodad}, {doohickey}, {gimmick},

{gubbins}, {thingamabob}, {thingumabob}, {thingmabob},

{thingamajig}, {thingumajig}, {thingmajig}, {thingummy}]

2: a device that very useful for a particular job [syn: {appliance},

{contraption}, {contrivance}, {convenience}, {gadget}, {widget}]