(seed-DOER) n. Siddur. Prayer book. Arrangement of the book begins with Shacharit, Minchah, and Ma‘ariv services, then Shabbat and festival services. A Machzor is a prayerbook used for holiday services.

a book outlining the liturgy of religious services

(formally, "Book of Common Prayer" - A book containing the authorized forms of services and for the administration of the sacrament; the first Prayer Book was published in 1549, and the most recent were published in 1928 (USA) and 1962 (Canada).

Book of Alternative Services (BAS), Book of Common Prayer (BCP).

a short way of referring to the Book of Common Prayer, the worship book of the Episcopal Church containing services, psalms, prayers, etc.

This sets down all of the Church of England services and form of prayers for the year.