dextrousness

from The Collaborative International Dictionary of English v.0.48

Dextrous \Dex"trous\, a., Dextrously \Dex"trous*ly\, adv.,
Dextrousness \Dex"trous*ness\, n.
   Same as {Dexterous}, {Dexterously}, etc.
   [1913 Webster]