stud1
  
  n.
     - a large-headed piece of metal that pierces and projects from a surface, especially for decoration. 
▸Brit. a small projection fixed to the base of a shoe or boot to provide better grip.
 ▸a small object projecting slightly from a road surface as a marker.
 - a small piece of jewellery which is pushed through a pierced ear or nostril.
 - a fastener consisting of two buttons joined with a bar, used in formal wear to fasten a shirt front or to fasten a collar to a shirt.
 - an upright timber in a wall to which laths and plasterboard are nailed. 
▸US the height of a room as indicated by the length of this.
 - a rivet or crosspiece in each link of a chain cable.
 
v.
 (studs, studding, studded)
  - decorate with studs or similar small objects.
 - strew or scatter:
 the sky was studded with stars.
 
 
  Derivative
  
  Etymology
  OE studu, stuthu ‘post, upright prop’.
 
  
    
stud2
  
  n.
    - an establishment where horses or other domesticated animals are kept for breeding.
 - 
(also stud horse)
 a stallion.
 - informal a sexually active or virile young man.
 - 
(also stud poker)
 a form of poker in which the first card of a player's hand is dealt face down and the others face up, with betting after each round of the deal.
 
 
  Etymology
  OE stōd, of Gmc origin; rel. to stand.