The Collaborative International Dictionary of English v.0.48:

Lithocarp \Lith"o*carp\ (l[i^]th"[-o]*k[aum]rp), n. [Litho- +
   Gr. karpo`s fruit: cf. F. lithocarpe.] (Paleon.)
   Fossil fruit; a fruit petrified; a carpolite.
   [1913 Webster]