What is the meaning of quaternary period?

noun

WordNet 3.0 © 2006 by Princeton University
13
 
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APAWordNet. (2010). Quaternary period. Retrieved September 20, 2026, from http://smartdefine.org/quaternary_period/definitions/1305005
ChicagoWordNet. 2010. "Quaternary period" http://smartdefine.org/quaternary_period/definitions/1305005 (accessed September 20, 2026).
HarvardWordNet 2010, Quaternary period, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/quaternary_period/definitions/1305005>.
MLAWordNet. "Quaternary period" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/quaternary_period/definitions/1305005>