The term 'STYPTIC' is a seven-letter word that can be used to describe a pencil that halts bleeding. It is derived from the Greek word 'styptikos, ' which means 'to contract or draw together.' STYPTIC pencils are made of astringent substances, such as alum, zinc sulfate, or potassium alum, and are used to stop minor bleeding from small cuts or shaving nicks. They are also sometimes used to treat insect bites and stings.