'balanorrhagia' originates from New Latin (through medical Latin), ultimately from Greek 'balanos' meaning 'acorn' (used for the glans) and Greek suffix '-rrhagia' from 'rhagē'/'rhagia' meaning 'a bursting forth' or 'excessive flow'.

'balanos' (Greek) + '-rrhagia' combined in Late/Medieval Latin and New Latin medical usage to form 'balanorrhagia', which entered modern medical English with this compound form.

Initially formed to denote an excessive flow or discharge associated with the glans; this specific medical meaning has been retained into modern usage.