Source : Webster's Revised Unabridged Dictionary (1913)

Agendum \A*gen"dum\, n.; pl. {Agenda}. [L., neut. of the
   gerundive of agere to act.]
   1. Something to be done; in the pl., a memorandum book.

   2. A church service; a ritual or liturgy. [In this sense,
      usually Agenda.]

Source : WordNet®

agendum
     n : a list of matters to be taken up (as at a meeting) [syn: {agenda},
          {order of business}]