Calvaria
Os
Os noun - A hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known.
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Synonyms for Os
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Os and Calvaria. (2016). Retrieved 2026, July 30, from https://thesaurus.plus/related/calvaria/os
Calvaria & Os. N.p., 2016. Web. 30 Jul. 2026. <https://thesaurus.plus/related/calvaria/os>.
Os or Calvaria. 2016. Accessed July 30, 2026. https://thesaurus.plus/related/calvaria/os.
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