'stibian' originates from New Latin, specifically the word 'stibianus', where 'stib-' referred to 'antimony' (from Latin 'stibium').

'stibian' changed from the New Latin adjective 'stibianus' and eventually became the modern English adjective 'stibian'.

Initially, it meant 'of or relating to stibium (antimony)', and over time it has retained the meaning 'relating to or containing antimony' in modern usage.