| asbestos |
one of two forms of a mineral that can be separated into fibers, is not combustible, and is resistant to chemical action, used to make fireproofing and insulating materials. [1/2 definitions] |
| assay |
to subject to chemical analysis to determine composition, quality, or potency, as with drugs or precious metals; make an assay of. [2/8 definitions] |
| astatine |
a highly radioactive chemical element of the halogen group that has eighty-five protons in each nucleus. (symbol: At) |
| astrophysics |
(used with a sing. verb) the branch of physics that deals with the physical and chemical properties of heavenly bodies and interstellar space. |
| At |
symbol of the chemical element astatine. |
| Au |
symbol of the chemical element gold. |
| B |
symbol of the chemical element boron. |
| Ba |
symbol of the chemical element barium. |
| barium |
a chemical element of the alkaline-earth group that has fifty-seven protons in each nucleus and that is usu. found in compounds such as salts. (symbol: Ba) [1/2 definitions] |
| base1 |
a chemical compound that creates salts when mixed with acids. (Cf. acid.) [1/7 definitions] |
| basic |
of or pertaining to a chemical base. [1/4 definitions] |
| battery |
a device that generates electricity by means of chemical reactions. [1/5 definitions] |
| Be |
symbol of the chemical element beryllium. |
| benzene |
a colorless, volatile, flammable liquid, obtained from petroleum and coal tar and used in or to make a wide variety of chemical products, such as insecticides, motor fuels, and solvents. |
| benzol |
an impure form of benzene, used in the chemical industry. [1/2 definitions] |
| beryllium |
a chemical element of the alkaline-earth group that has four protons in each nucleus and occurs in pure form as a hard, light, gray solid, chiefly used in alloys with copper and in aerospace material. (symbol: Be) |
| Bi |
symbol of the chemical element bismuth. |
| bicarbonate |
a chemical that is a variety of carbonate, used esp. in baking or as an antacid. (See sodium bicarbonate.) |
| bichloride |
a chemical compound in which there are two atoms of chlorine for each atom of another element or group; dichloride. |
| binary |
a chemical compound or a metal that contains two elements. [1/4 definitions] |
| bismuth |
a chemical element that has eighty-three protons in each nucleus and is a white brittle crystalline metal with very low thermal and electrical conductivity, used chiefly in alloys and medicines. (symbol: Bi) |