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Definition of Sulphinic
1. a. Of, pertaining to, or designating, any one of a series of acids regarded as acid ethereal salts of hyposulphurous acid; as, methyl sulphinic acid, CH3.SO.OH, a thick unstable liquid.
Definition of Sulphinic
1. Adjective. (alternative spelling of sulfinic) ¹
¹ Source: wiktionary.com