|a gadget; dingus; thingumbob.|
|a fool or simpleton; ninny.|
a fuel made primarily from oily plants (such as the soybean or oil palm) and to a lesser extent from other oily sources (such as waste cooking fat from restaurant deep-frying). Biodiesel, which has found greatest acceptance in Europe, is used in diesel engines and usually blended with petroleum diesel fuel in various percentages (see also renewable energy).
Learn more about biodiesel with a free trial on Britannica.com.