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| the offspring of a zebra and a donkey. |
| a gadget; dingus; thingumbob. |
| sparking plug | |
| —n | |
| Also called: spark plug a device screwed into the cylinder head of an internal-combustion engine to ignite the explosive mixture by means of an electric spark which jumps across a gap between a point earthed to the body of the plug and the tip of a central insulated rod | |