frau: a German courtesy title or form of address for an adult woman
title: an identifying appellation signifying status or function: e.g. `Mr.' or `General'
formic acid: a colorless pungent fuming vesicatory liquid acid HCOOH found naturally in ants and many plants or made catalytically from carbon monoxide and steam; used in finishing textiles and paper and in the manufacture of insecticides and fumigants