bolus

1. A round mass: "A dense bolus of trapped dolphins fills the frame" (Kenneth Browser).
2. 1. A single, relatively large quantity of a substance, such as a dose of a drug, intended for therapeutic use and taken orally.
   2. A concentrated mass of a substance administered intravenously for diagnostic or therapeutic purposes.
3. A soft mass of chewed food within the mouth or alimentary canal.

[Medieval Latin bōlus, from Greek bōlos, lump of earth.]

A mass of food ready to be swallowed or a mass passing through the intestines.

1. a rounded mass of food or pharmaceutical preparation ready to be swallowed, or such a mass passing through the gastrointestinal tract. In previous times most medication for horses was given by bolus. Called also ball.
2. a concentrated mass of pharmaceutical preparation, e.g. an opaque contrast medium, given intravenously.
3. a mass of scattering material, such as wax or paraffin, placed between the radiation source and the skin to achieve a precalculated isodose pattern in the tissue irradiated.

• alimentary b. — the mass of food, made ready by mastication, that enters the esophagus at one swallow.
• intraruminal identification b. — contain passive radiofrequency responders for individual animal identification. Used in sheep and cattle.
• physic b. — see physic (2).
• purging b. — an oldtime treatment for equine colic. Usually contained aloes or istin.

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Bolus can refer to: something that is given intravenously

Contents 1 Medicine 2 People 3 Other 4 See also

Medicine

• Bolus (medicine), the administration of a drug, medication or other substance in the form of a single, large dose
• Bolus (radiation therapy), a tissue equivalent substance used in radiation therapy
• Bolus (digestion), a ball-shaped mass moving through the digestive tract
• Bolus tracking, technique used in computed tomography imaging, to visualise vessels more clearly
• Triple bolus test, a medical diagnostic procedure used to assess pituitary function

People

• Bolus of Mendes (4th century BC), ancient Greek philosopher
• Harry Bolus (1834 - 1911), South African botanist, botanical artist, businessman and philanthropist.
• Malvina Bolus (1906 - 1997), Canadian historian and art collector, and editor of the Hudson's Bay Company magazine The Beaver.
• Brian Bolus (born 1934), former English cricketer who played in 7 Tests from 1963

Other

• Vigilante Bolus, an insecticide used with cattle to reduce the number of flies in an area.
• Bolus Herbarium, a herbarium at the University of Cape Town established in 1865 from a donation by Harry Bolus
• Bolus, a pastry from the Netherlands
• Bolus hook, an instrument in a Jacquard loom
• Bolus, or Baulus, an Anatolian village on the site of ancient Berissa

See also

• Bolas, a throwing weapon

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