Transubstantiation, "a long and difficult term"

From the Book, "Priest where is thy Mass, Mass where is thy Priest?", Angelus Press

Seventeen Roman Catholic priests (none of whom are formally members of the Society of Saint Pius X) explain why they celebrate the old rite of the Latin Mass instead of the New Mass. In question and answer format, these priests tell their trials and triumphs over the Novus Ordo establishment. Inspiring and often heroic examples of fidelity to their priestly vocation. Who ever would have thought that it would come to this?

Archbishop William Levada, Prefect for the Sacred Congregation for the Doctrine of the Faith, told Father Eugene Heidt that Transubstantiation is a “long and difficult term” and “we don’t use that term any more”. (p. 64)