The expression "True Orthodox church" () is synonym for this latter, narrower sense of "catacomb church".
ðɪ ɛkspɹˈɛʃən "tɹˈuː ˈɔːɹθədˌɑːks tʃˈɜːtʃ" ɪz sˈɪnənˌɪm fɔːɹ ðɪs lˈæɾɚ, nˈæɹoʊɚ sˈɛns ʌv "kˈæɾɐkˌoʊm tʃˈɜːtʃ".