What is the meaning of silurian period?

noun

  • From 425 million to 405 million years ago; first air-breathing animals.
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). silurian period. Retrieved September 23, 2026, from http://smartdefine.org/silurian_period/definitions/1310725
ChicagoWordNet. 2010. "silurian period" http://smartdefine.org/silurian_period/definitions/1310725 (accessed September 23, 2026).
HarvardWordNet 2010, silurian period, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/silurian_period/definitions/1310725>.
MLAWordNet. "silurian period" 23 October 2010. Web. 23 September 2026. <http://smartdefine.org/silurian_period/definitions/1310725>