numerary

adj

1. (not-comparable)Relating to numbers or numbering.
2. (not-comparable)Of a position which is held by a certain person permanently (in an administration or academy).

noun

1. A person with a numerary or permanent position.
2. A celibate lay member of Opus Dei, a Roman Catholic religious institution.

   “Like numeraries, assistant numeraries are celibates who live in Opus Dei centres.”