Definitions for "Litmus paper"
Keywords:  dipped, blue, unsized, powder, turns
litmus test. Paper impregnated with litmus, usually cut in narrow strips. Dipping red litmus paper into a basic solution turns it blue; dipping blue litmus paper into an acidic solution turns it red.
Paper with powder extracted from certain plants that tests the pH of a substance. Acid turns red while base turns blue; neutral remains white. The stronger the acid or base, the more intense red or blue the color of the litmus paper turns.
paper that indicates how acidic or basic an object or liquid is. If the paper turns red when touched by the object or liquid, it is acidic. If the paper turns blue, the object or liquid is basic.