Source : Webster's Revised Unabridged Dictionary (1913)

Psalmody \Psal"mo*dy\, n. [Gr. ?; ? psalm + ? a song, an ode:
   cf. F. psalmodie, LL. psalmodia. See {Psalm}, and {Ode}.]
   The act, practice, or art of singing psalms or sacred songs;
   also, psalms collectively, or a collection of psalms.

Source : WordNet®

psalmody
     n : the act of singing psalms or hymns [syn: {hymnody}]