名詞 paleozoic:

1. from 544 million to about 230 million years ago
   同義詞：Paleozoic era

形容詞 paleozoic:

1. of or relating to or denoting the Paleozoic era

Pa.le.o.zo.ic

adj.（形容詞）
Of, belonging to, or designating the era of geologic time that includes the Cambrian, Ordovician, Silurian, Devonian, Mississippian, Pennsylvanian, and Permian periods and is characterized by the appearance of marine invertebrates, primitive fishes, land plants, and primitive reptiles.See table at geologic time
古生代的：地質時代的一個時期的，屬于這個時期的或這么稱呼的，包括寒武紀、奧陶紀、志留紀、泥盆紀、密西西比紀、賓夕法尼亞紀和二疊紀時期，并且以海洋無脊椎動物、原始魚類、陸地植物和早期爬行動物的出現(xiàn)為特征參見 geologic time
n.（名詞）
The Paleozoic Era.
古生代