• WordNet 3.6
    • n embolus an abnormal particle (e.g. an air bubble or part of a clot) circulating in the blood
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Webster's Revised Unabridged Dictionary
    • Embolus (Med) A plug of some substance lodged in a blood vessel, being brought thither by the blood current. It consists most frequently of a clot of fibrin, a detached shred of a morbid growth, a globule of fat, or a microscopic organism.
    • Embolus Something inserted, as a wedge; the piston or sucker of a pump or syringe.
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Century Dictionary and Cyclopedia
    • n embolus Something inserted into or acting within something else; that which thrusts or drives, as a piston or wedge.
    • n embolus The clot of fibrin obstructing a blood-vessel, causing embolism: as, capillary emboli.
    • n embolus The nucleus emboliformis of the cerebellum.
    • n embolus Also embolon, embolum.
    • n embolus The terminal portion of the digital joint of the palpus of a male spider, containing an orifice near the tip through which the seminal fluid is collected and later ejected.
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Chambers's Twentieth Century Dictionary
    • n Embolus the clot of fibrin obstructing a blood-vessel, causing embolism
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Webster's Revised Unabridged Dictionary
L., fr. Gr. pointed so as to be put or thrust in, fr. to throw, thrust, or put in. See Emblem
Chambers's Twentieth Century Dictionary
Fr.,—Gr. embolismosemballein, to cast in.


In literature:

There is sudden pain at the site of impaction of the embolus, and the pulses beyond are lost.
"Manual of Surgery" by Alexis Thomson and Alexander Miles
An embolus may be so large as to be unable to pass through the valvular orifices of the heart.
"A System of Practical Medicine by American Authors, Vol. I" by Various

In news:

A section of a bone marrow embolus.