Latin triarii (plural), a class of Roman soldiers who formed the third rank from the front, from tres, tria, three.
"triarian." YourDictionary, n.d. Web. 23 June 2018. <http://www.yourdictionary.com/triarian>.
triarian. (n.d.). Retrieved June 23rd, 2018, from http://www.yourdictionary.com/triarian
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