PHOSPHONIUM

Noun

phosphonium (plural phosphoniums)

(chemistry) the tetravalent positively-charged phosphorus cation R4P+

Source: Wiktionary


Phos*pho"ni*um, n. Etym: [Phosphorus + ammonium.] (Chem.)

Definition: The hypothetical radical PH4, analogous to ammonium, and regarded as the nucleus of certain derivatives of phosphine.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

17 May 2025

ANTHOZOAN

(noun) sessile marine coelenterates including solitary and colonial polyps; the medusoid phase is entirely suppressed


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