'attorneydom' is a Modern English formation from the noun 'attorney' + the suffix '-dom' (from Old English 'dōm', meaning 'judgment, jurisdiction, domain').

'attorney' comes from Old French 'atorné'/'atorner' (to appoint), ultimately from Late Latin 'attornare' (to appoint), while '-dom' derives from Old English 'dōm' (judgment, statute, condition); these elements combined in Modern English to form the nonce or humorous compound 'attorneydom'.

Originally a literal combination meaning 'the domain or office of an attorney', it is used chiefly in modern English as a rare, humorous, or informal abstract/collective noun referring to attorneys as a group or their sphere of activity.