The Collaborative International Dictionary of English v.0.48:

Baetulus \B[ae]"tu*lus\, n.; pl. B[ae]tuli. [L., fr. Gr.
   bai`tylos a sacred meteorite.] (Antiq.)
   A meteorite, or similar rude stone artificially shaped, held
   sacred or worshiped as of divine origin.
   [1913 Webster]

         All the evidence goes to prove that these menhirs are
         b[ae]tuli, i. e., traditional and elementary images of
         the deity.                               --I. Gonino
                                                  (Perrot &
                                                  Chipiez).
   [Webster 1913 Suppl.]