| bom | <zoology> A large American serpent, so called from the sound it makes. Source: Websters Dictionary (01 Mar 1998) |
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| radium | The celebrated radioactive element discovered by Marie and pierre curie in 1898. (12 Dec 1998) |
| radium beam therapy | Therapeutic use of radium rays, the source of which is a quantity of radium at a distance from the patient. Synonym: radium beam therapy. (05 Mar 2000) |