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Definition of Sulphophosphorous
1. a. Of, pertaining to, or designating, a hypothetical acid of phosphorus, analogous to phosphorous acid, and known in its salts.
Definition of Sulphophosphorous
1. Adjective. (chemistry dated) Of, relating to, or designating a hypothetical acid of phosphorus, known in its salts. ¹
¹ Source: wiktionary.com