Embolus
Embolus , noun
[Latin, from Greek {not transcribed} pointed so as to be put or thrust in, from {not transcribed} to throw, thrust, or put in. See Emblem.]
1.
Something inserted, as a wedge; the piston or sucker of a pump or syringe.
2.
(Medicine) 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.