'arsenobismite' originates from New Latin/mineralogical coinage, combining the prefix 'arseno-' (from 'arsenic') and 'bismite' (from 'bismuth'), where 'arseno-' meant 'arsenic' and 'bismuth' referred to the element bismuth.

'arsenobismite' was formed in modern mineralogical nomenclature by combining 'arseno-' + 'bismite' to name a bismuth arsenate mineral; the compound name reflects its constituent elements rather than evolving through older English forms.

Initially used to name minerals containing both arsenic and bismuth (an arsenate of bismuth); the meaning has remained specialized and refers specifically to that mineral type.