Meaning of dextrosinistral

dex•tro•sin•is•tral

Pronunciation: (dek"strō-sin'u-strul), [key]
— adj.
  1. passing or extending from the right to the left.
  2. left-handed, but having the right hand trained for writing.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.