osteocommas

from The Collaborative International Dictionary of English v.0.48

Osteocomma \Os`te*o*com"ma\, n.; pl. L. {Osteocommata}, E.
   {Osteocommas}. [NL. See {Osteo-}, and {Comma}.] (Anat.)
   A metamere of the vertebrate skeleton; an osteomere; a
   vertebra. --Owen.
   [1913 Webster]