enneatic
En`ne*at"ic, En`ne*at"ic*al, a. Etym: [Gr. Defn: Occurring once in every nine times, days, years, etc.; every ninth. Enneatical day, every ninth day of a disease. -- Enneatical year, every ninth year of a man's life.
En`ne*at"ic, En`ne*at"ic*al, a. Etym: [Gr. Defn: Occurring once in every nine times, days, years, etc.; every ninth. Enneatical day, every ninth day of a disease. -- Enneatical year, every ninth year of a man's life.