Proterozoikum

== German == === Etymology === Learned borrowing from New Latin Proterozoicum. === Pronunciation === IPA(key): /pʁoteʁoˈtsoːikʊm/ === Proper noun === das Proterozoikum n (proper noun, strong, usually definite, definite genitive des Proterozoikums) the Proterozoic ==== Declension ==== === See also === Paläoproterozoikum Mesoproterozoikum Neoproterozoikum Präkambrium Archaikum Phanerozoikum === Further reading === “Proterozoikum” in Duden online