n.
     - a small, rounded piece of glass, stone, plastic, etc., perforated and typically threaded in a string with others to make a necklace or rosary.
 - a drop of a liquid on a surface.
 - a small knob forming the foresight of a gun.
 - the reinforced inner edge of a tyre.
 - an ornamental plaster moulding resembling a string of beads or having a semicircular cross section.
 
v.
  - decorate or cover with beads.
 - form into a string like beads.
 
 
  Phrase
  
    
      - draw 
(or get)
 a bead on
 informal, chiefly N. Amer. take aim at with a gun. 
    
   
  Derivative
  
  Etymology
  OE gebed ‘prayer’, of Gmc origin; current senses derive from the use of a rosary (each bead representing a prayer).