\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.
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.