Source : Webster's Revised Unabridged Dictionary (1913)

Silkiness \Silk"i*ness\, n.
   1. The quality or state of being silky or silken; softness
      and smoothness.

   2. Fig.: Effeminacy; weakness. [R.] --B. Jonson.

Source : WordNet®

silkiness
     n : the smooth feel of silk fabric [syn: {sleekness}]