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 October 1, 2026, from http://smartdefine.org/quaternary_period/definitions/1305005
ChicagoWordNet. 2010. "quaternary period" http://smartdefine.org/quaternary_period/definitions/1305005 (accessed October 1, 2026).
HarvardWordNet 2010, quaternary period, Smart Define, viewed 1 October, 2026, <http://smartdefine.org/quaternary_period/definitions/1305005>.
MLAWordNet. "quaternary period" 23 October 2010. Web. 1 October 2026. <http://smartdefine.org/quaternary_period/definitions/1305005>