|any of various powdered mixtures that contain sodium bicarbonate, starch (usually flour), and one or more slightly acidic compounds, such as cream of tartar: used in baking as a substitute for yeast|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|a fool or simpleton; ninny.|
|baking powder (bā'kĭng) Pronunciation Key
A mixture of baking soda, a nonreactive filler (such as starch), and at least one slightly acidic compound (such as cream of tartar). Baking powder works as a leavening agent in baking by releasing carbon dioxide when mixed with a liquid, such as milk or water.