céin Definitions (by source) Show all Poems on the O'Reillys (<cian) in phrase an gcéin, as long as, 1321 Poems on the O'Reillys. Editor: James Carney. Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death see cian Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death. Author: Geoffrey Keating. Editor: Osborn Bergin.