\In*vi"ta*to*ry\, a. [L. invitatorius: cf. F.
invitatoire.]
Using or containing invitations.
      The ``Venite'' [Psalm xcv.], which is also called the
      invitatory psalm.                        --Hook.

\In*vi"ta*to*ry\, n.; pl. {Invitatories}. [LL.
invitatorium: cf. F. invitatoire.]
That which invites; specifically, the invitatory psalm, or a
part of it used in worship.