The Collaborative International Dictionary of English v.0.48:

Stunted \Stunt"ed\, a.
   Dwarfed. -- Stunt"ed*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

stuntedness
    n 1: smallness of stature [syn: puniness, runtiness,
         stuntedness]