CATHEDRA

cathedra, bishop's throne

(noun) a throne that is the official chair of a bishop

Source: WordNet® 3.1

Etymology

Noun

cathedra (plural cathedrae or cathedras)

The chair or throne of a bishop.

The rank of bishop.

The official chair of some position or office, as of a professor.

Source: Wiktionary

Cath"e*dra, n. Etym: [L., fr. Gr. Chair.]

Definition: The official chair or throne of a bishop, or of any person in high authority. Ex cathedra Etym: [L., from the chair], in the exercise of one's office; with authority. The Vatican Council declares that the Pope, is infallible "when he speaks ex cathedra." Addis & Arnold's Cath. Dict.

Source: Webster’s Unabridged Dictionary 1913 Edition