Source : Webster's Revised Unabridged Dictionary (1913)

Sursum corda \Sur"sum cor"da\ [L. sursum upward + corda hearts.]
   (Eccl.)
   In the Eucharist, the versicles immediately before the
   preface, inviting the people to join in the service by
   ``lifting up the heart'' to God.

Source : WordNet®

sursum corda
     n : (Roman Catholic Church) a Latin versicle meaning `lift up
         your hearts'