Cardinal bishops (cardinals of the episcopal order) are among the most senior prelates of the Catholic Church. Though in modern times most cardinals are also bishops, the term "cardinal bishop" only refers to the cardinals who are titular bishops of one of the "suburbicarian" sees.
Is there an answer to this question (If it cannot be answered, say "unanswerable"): What does the term "cardinal bishop" not refer to?
unanswerable