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Definition: 'Bolus'

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bolus (bol)

Type: Term

Pronunciation: bō′lŭs

Definitions:
1. A single, relatively large quantity of a substance, usually one intended for therapeutic use, such as a bolus dose of a drug injected intravenously.
2. A masticated morsel of food or another substance ready to be swallowed, such as a bolus of barium for radiographic studies.
3. In high-energy radiation therapy, a quantity of tissue-equivalent material placed in the radiation beam, over the surface of the irradiated region, to increase the absorbed dose in the superficial tissues.




The definition information for bolus is provided by Stedman's. You can search our medical dictionary here.

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Medical Dictionary Copyright © 2006 Lippincott Williams & Wilkins. All rights reserved.








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