scapular
In this context, it's ecclesiastical and refers to a short cloak over the shoulders worn by some religious orders.
salvation
In a religious context, it refers to being delivered from the effects of one’s wrongdoing through belief and faith in the death and resurrection of Jesus Christ.
rose window
Usually a stained glass circular window with sections radiating outwards like the petals of a rose.
Great Silence
In the context of the book, it refers to a silence so profound that it seems at once full of nothingness and sound.
clapper
Device that makes a sound like clapping.
genuflect
Latin for 'to bend the knee', or 'bow'.
antiphon
Part of the liturgy, it is a sentence sung or recited before or after a psalm or canticle.
breviary
In Roman Catholic orders, the book containing the daily services.
canonization
The process by which someone is made into a saint in the Catholic Church.
rostrum
A stage, or raised platform people stand on to make a presentation.
postulant
Someone wanting to enter religious orders.
vocation
A spiritually felt calling to a certain job.
novena
A 9-day cycle of special prayers or services.
liturgy
A scripted form of Christian public worship.
scourging
Whipping.
mensa
The top of an altar.
tintinnabulum
A set of bells.
Service of the Hours
Services done at set times during the day. These consist of Matins (before dawn), Lauds (dawn), Terce (9 AM), Sext (noon), None (3 PM), Vespers (sunset), and Compline (after sunset, before bed).
Eucharist
The Lord's Supper.
the discipline
The tool used by Carmelites for voluntary self-flagellation.