<span class="searchmatch">prōtactīnia</span> nominative/accusative/vocative plural of prōtactīnium...
nominative prōtactīnium <span class="searchmatch">prōtactīnia</span> genitive prōtactīniī prōtactīniōrum dative prōtactīniō prōtactīniīs accusative prōtactīnium <span class="searchmatch">prōtactīnia</span> ablative prōtactīniō...