Source : Webster's Revised Unabridged Dictionary (1913)

Pentamera \Pen*tam"e*ra\, n. pl. [NL. See {Pentamerous}.]
   (Zo["o]l.)
   An extensive division of Coleoptera, including those that
   normally have five-jointed tarsi. It embraces about half of
   all the known species of the Coleoptera.