Science / Chemistry / Litmus: A mixture of pigments extracted from certain lichens that turns blue in basic solution and red in acidic solution.
Science / Chemistry / Litmus Paper: 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. MORE
Entertainment / Literature / Metadrama: Drama in which the subject of the play is dramatic art itself, especially when such material breaks up the illusion of watching reality. When Macbeth cries out, 'Life's but a walking shadow, a poor pl MORE