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perissad

noun
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pe·​ris·​sad | \ pəˈrisəd, -iˌsad \
plural -s

Definition of perissad

1 obsolete : an element or radical of odd valence
2 : an element of odd atomic number —contrasted with artiad

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History and Etymology for perissad

Greek perissos beyond the regular number or size, superfluous, excessive, uneven (from peri around, beyond) + English -ad

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“Perissad.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/perissad. Accessed 22 Jun. 2021.

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