Greek, from ous- (stem of ōn, present participle of einai to be) + -ia -y
1861, in the meaning defined at sense 1
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où sont les neiges d'antan?
“Ousia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ousia. Accessed 24 Sep. 2023.
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