noun pl. boluses
- a small, round lump or mass, as of chewed food
- Med. a mass injected into a blood vessel, as an opaque contrast medium or a radioactive tracer
- Vet.Med. a large pill
ML: see bole
See bolus in American Heritage Dictionary 4
noun pl. bo·lus·es
- A round mass: “A dense bolus of trapped dolphins fills the frame” (Kenneth Browser).
a. A single, relatively large quantity of a substance, such as a dose of a drug, intended for therapeutic use and taken orally.
b. A concentrated mass of a substance administered intravenously for diagnostic or therapeutic purposes.
- A soft mass of chewed food within the mouth or alimentary canal.
Origin: Medieval Latin bōlus
Origin: , from Greek bōlos, lump of earth
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