The word Novena is the feminine form of the Medieval Latin word, "novnus", "nine each", which is from novem, nine.
In the Catholic Church, a novena is a devotion consisting of prayer said (most typically) on nine successive days, asking to obtain special graces. These may consist of small prayer books, recitation of the Rosary, or small prayers through the day.
It is one of the Sacramentals of the Church.