Fidei Defensor

[ fee-de-ee de-fen-sohr; English fahy-dee-ahy di-fen-sawr ]
/ ˈfi dɛˌi dɛˈfɛn soʊr; English ˈfaɪ diˌaɪ dɪˈfɛn sɔr /

noun Latin.

Defender of the Faith: one of the titles of English sovereigns.

British Dictionary definitions for fidei defensor

Fidei Defensor
/ Latin (ˈfaɪdɪˌaɪ dɪˈfɛnsɔː) /

noun

defender of the faith; a title given to Henry VIII by Pope Leo X, and appearing on Brit coins as FID DEF or FD