'Embolus' definitions:

Definition of 'embolus'

(from WordNet)
noun
An abnormal particle (e.g. an air bubble or part of a clot) circulating in the blood

Definition of 'Embolus'

From: GCIDE
  • Embolus \Em"bo*lus\, n.; pl. Emboli. [L., fr. Gr. ? pointed so as to be put or thrust in, fr. ? to throw, thrust, or put in. See Emblem.]
  • 1. Something inserted, as a wedge; the piston or sucker of a pump or syringe. [1913 Webster]
  • 2. (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. [1913 Webster]