Source : Webster's Revised Unabridged Dictionary (1913)

Testicardines \Tes`ti*car"di*nes\, n. pl. [NL. See {Test} a
   shell, and {Cardo}.] (Zo["o]l.)
   A division of brachiopods including those which have a
   calcareous shell furnished with a hinge and hinge teeth.
   Terebratula and Spirifer are examples.