'psoric' originates from Greek, specifically the word 'psōra' (ψώρα), where 'psōra' meant 'itch' or 'scab'.

'psōra' passed into Late Latin/medical Latin as 'psora' and then into Neo-Latin/medical usage as 'psoricus' or adjectival forms, eventually entering English as 'psoric' in medical and homeopathic texts.

Initially it meant 'relating to itching or scab-like skin disease'; over time the term has been used more narrowly for conditions like psoriasis or in homeopathy to denote the 'psoric' miasm, and today is largely archaic or technical.