corn·starch 
/ˈkoɚnˌstɑɚtʃ/ noun
/ˈkoɚnˌstɑɚtʃ/ noun [noncount] US : a fine powder made from corn (sense 1) that is used in cooking especially to make liquids thicker
▪ I used some cornstarch to thicken the gravy. —called also (Brit) corn flour
▪ I used some cornstarch to thicken the gravy. —called also (Brit) corn flour
