embolon

noun4

1. •
   A blood clot or swelling, particularly one that blocks an artery; an embolus.
2. •
   (historical) A military formation, usually shaped like a wedge.

   • Suddenly Alexander formed the left front of the phalanx into a wedge (embolon) and charged the Dardanians on the nearest slopes. — 2001
3. •
   (historical) A battering ram on a warship.
4. •
   (no longer used, rare) Anything wedge-shaped.