'auscultator' originates from Latin, specifically the verb 'auscultare' and the related Latin agent noun 'auscultator', where 'auscultare' meant 'to listen'.

'auscultator' passed into English from Late Latin/Medieval Latin 'auscultator' (and via French 'auscultateur' in some usages), ultimately becoming the English medical term 'auscultator'.

Initially it meant 'one who listens', and over time it evolved into the more specialized medical meaning 'a person who listens to internal body sounds (for diagnosis)'.