silurian

• Имя собственное, обозначающее геологический период от примерно 425 до 405 миллионов лет назад, известный появлением первых дышащих воздухом животных.

A proper noun referring to a geological period from approximately 425 to 405 million years ago, known for the emergence of the first air-breathing animals.

неисчисляемое · имя собственное

1. Geological periodC1formalscientific

   The third period of the Paleozoic Era, spanning from about 443.8 to 419.2 million years ago, characterized by the first appearance of land plants and air-breathing animals.

   Силурийский период

   • The Silurian period saw the emergence of the first vascular plants.
   • Fossils from the Silurian era include early jawless fish.
   • During the Silurian, the first air-breathing arthropods appeared on land.