lectionary

from The Collaborative International Dictionary of English v.0.48

Lectionary \Lec"tion*a*ry\, n.; pl. {-ries}. [LL. lectionarium,
   lectionarius : cf. F. lectionnaire.] (Eccl.)
   A book, or a list, of lections, for reading in divine
   service.
   [1913 Webster]