WordWeb Online

1. Something unspecified whose name is either forgotten or not known
   "she eased the ball-shaped gismo back into its socket";
   - doodad [N. Amer, informal], doohickey [N. Amer, informal], dojigger [N. Amer, informal], gizmo [informal], gubbins [Brit, informal], thingamabob [informal], thingumabob [informal], thingmabob [informal], thingamajig [informal], thingumajig [informal], thingmajig [informal], thingummy [informal], whatchamacallit [informal], whatsis [informal], doodah [Brit, informal], doobrie [Brit, informal], doobry [Brit, informal], thingy [informal], doover [Austral, informal], dingus [N. Amer, informal], thingamy [informal], doofer [Brit, informal], thingo [Austral, informal], whatsit [informal]
    
2. A device or control that is very useful for a particular job
   - appliance, contraption, contrivance, convenience, gadget, gizmo [informal], widget

Derived forms: gismos

Type of: device, stuff

Encyclopedia: Gismo