of or relating to the Silures or their country.
Geology. noting or pertaining to a period of the Paleozoic Era, occurring from 425 to 405 million years ago, notable for the advent of air-breathing animals and terrestrial plants.
Geology. the Silurian Period or System of rocks.
of, denoting, or formed in the third period of the Palaeozoic era, between the Ordovician and Devonian periods, which lasted for 25 million years, during which fishes first appeared
of or relating to the Silures
the Silurian, the Silurian period or rock system
The third period of the Paleozoic Era, from about 438 to 408 million years ago. During this time glaciers that formed during the late Ordovician melted, causing sea levels to rise. The first coral reefs, fish with jaws, and freshwater fish appeared, and jawless fish continued to spread rapidly. The first vascular plants also appeared, as did land invertebrates including relatives of spiders and centipedes. See Chart at geologic time.
noun 1. any of numerous Old World freshwater fishes of the family Siluridae, comprising the catfishes. adjective 2. belonging or pertaining to the family Siluridae. noun 1. any freshwater teleost fish of the Eurasian family Siluridae, including catfish, such as Silurus glanis (European catfish), that have an elongated body, naked skin, and a long anal […]
noun 1. the forest trees of a particular area. 2. a descriptive flora of forest trees. noun 1. a variant spelling of sylva
Trademark. 1. a brand name for silver sulfadiazine.
noun, Chemistry. 1. a nonmetallic element, having amorphous and crystalline forms, occurring in a combined state in minerals and rocks and constituting more than one fourth of the earth’s crust: used in steelmaking, alloys, etc. Symbol: Si; atomic weight: 28.086; atomic number: 14; specific gravity: 2.4 at 20°C. noun 1. a brittle metalloid element that […]