| boron | <chemistry, element> Fifth element (Z=5) in the periodic table, has 5 protons, potential use as an aneutronic fuel. Also useful as a neutron-absorber. Abbreviation: B (13 Nov 1997) |
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| boron compounds | Inorganic or organic compounds that contain boron as an integral part of the molecule. (12 Dec 1998) |
| boron neutron capture therapy | A technique for the treatment of neoplasms, especially gliomas and melanomas in which boron-10, an isotope, is introduced into the target cells followed by irradiation with thermal neutrons. (12 Dec 1998) |
| calcium carbide | CaC2;blackish crystalline lumps which when in contact with water yield acetylene gas. (05 Mar 2000) |
| carbide | A compound of carbon with an element more electropositive than itself; e.g., CaC2, calcium carbide. (05 Mar 2000) |
| tungsten carbide | <chemical> One of the hardest known materials, used as an abrasive and in the manufacture of dental cutting instruments. (05 Mar 2000) |