Perissad Per"is*sad, a. [Gr. ? odd, from ? over.] (Chem.) Odd; not even; -- said of elementary substances and of radicals whose valence is not divisible by two without a remainder. Contrasted with artiad. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • perissad — pe·ris·sad …   English syllables

  • perissad — pəˈrisəd, iˌsad noun ( s) Etymology: Greek perissos beyond the regular number or size, superfluous, excessive, uneven (from peri around, beyond) + English ad 1. obsolete : an element or radical of odd valence …   Useful english dictionary

  • ar|ti|ad — «AHR tee ad», noun, adjective. –n. an atom or element whose valence is expressed by an even number. –adj. having the valence expressed by an even number. See also perissad. (Cf. ↑perissad) ╂[< Greek ártios even] …   Useful english dictionary

  • artiad — ˈärd.ēˌad, rshēˌ noun ( s) Etymology: Greek artios even + English ad 1. a. obsolete : an element or radical of even valence b …   Useful english dictionary

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