1789, in the meaning defined above
borrowed from Italian, from Adula, mountain group in the Lepontine Alps east of St. Gotthard Pass (Switzerland) + -aria (borrowed from Latin -āria, feminine singular of -ārius -ary entry 1)
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“Adularia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/adularia. Accessed 5 Mar. 2021.
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