| abstract |
existing without physical shape or substance. [1/3 definitions] |
| acid |
a chemical substance that dissolves in water, has a sour taste, and turns blue litmus paper red. [1/4 definitions] |
| additive |
a substance added to another substance in small amounts to change or improve it. |
| adhesive |
a sticky substance or material such as glue. [1/2 definitions] |
| alloy |
a substance made by mixing two or more metals or a metal and another substance. |
| antacid |
a substance people take to settle an upset stomach. Antacids work by reducing the strength of the acids that cause the upset. |
| antibiotic |
substance derived from fungi or other organisms and used to destroy or prevent the growth of bacteria or other disease-causing organisms. |
| antidote |
a substance that stops poison from working or cures a disease. |
| antifreeze |
a substance that lowers the freezing point of a liquid such as water. |
| antiseptic |
a substance or drug that kills germs that cause disease or decay. |
| arsenic |
a poisonous substance that is one of the chemical elements. It can be either grayish white, yellow, or black. (symbol: As) |
| asphalt |
a sticky black substance like tar. Asphalt is found naturally or obtained when oil is refined. It is used for making roads and roofs and for making things waterproof. [2 definitions] |
| bar1 |
a solid mass of a substance often in the shape of an oblong block. [1/10 definitions] |
| beryllium |
a hard, light, gray substance that is one of the chemical elements. Beryllium is sometimes combined with other elements to form an alloy. It is also used in building rockets. (symbol: Be) |
| blacktop |
a substance such as asphalt, used as pavement. [1/2 definitions] |
| bleach |
a substance used to make something white or lighter in color. [1/3 definitions] |
| caffeine |
a bitter substance found in coffee, tea, chocolate, and some sodas. Caffeine stimulates the heart and nervous system and can cause a person to stay awake and alert. |
| cake |
a hard, shaped mass of some substance. [1/4 definitions] |
| calcium |
a soft, silver-white substance that is one of the chemical elements. Calcium is found in many kinds of rocks. It is used by the body for building healthy bones and teeth. (symbol: Ca) |
| camphor |
a white substance with a very strong smell that is taken from the camphor tree. A form of camphor can also be made by people. Camphor is used in making some kinds of medicine and plastic. |
| chalk |
a substance made from natural chalk that is formed into round sticks that can be used to write or draw with, especially on a blackboard or on pavement. [1/3 definitions] |