hearthstone

from WordNet (r) 3.0 (2006)

hearthstone
    n 1: a stone that forms a hearth

from The Collaborative International Dictionary of English v.0.48

Hearthstone \Hearth"stone`\ (-st[=o]n`), n.
   Stone forming the hearth; hence, the fireside; home.
   [1913 Webster]

         Chords of memory, stretching from every battlefield and
         patriot grave to every living heart and hearthstone.
                                                  --A. Lincoln.
   [1913 Webster]