pompom

Multiple Entries:
  pompom    pom-pom  

Concise Oxford English Dictionary © 2008 Oxford University Press:
pompom /ˈpɒmpɒm/ (also pompon)

▶noun

• 1 a small woollen ball attached to a garment for decoration.

• 2 a dahlia, chrysanthemum, or aster with small tightly clustered petals.

– origin C18: Fr. pompon, of unknown origin.

Concise Oxford English Dictionary © 2008 Oxford University Press:
pom-pom/ˈpɒmpɒm/

▶noun Brit. an automatic quick-firing two-pounder cannon of the Second World War period, typically mounted on a ship and used against aircraft.

– origin C19: imitative of the sound of the discharge.