'anteroprostatic' is a modern medical compound formed from the combining form 'antero-' (from Latin 'ante' meaning 'before, in front of') + 'prostatic' (from 'prostate', ultimately from Greek 'prostates' meaning 'one who stands before').

'prostate' entered English via Latin from Greek 'prostates'; 'prostatic' developed as the adjective relating to the prostate, and 'anteroprostatic' was formed in modern medical usage by prefixing the combining form 'antero-' to indicate position 'in front of the prostate'.

The components originally meant 'before' (ante) and 'one who stands before' (prostates), but in the compound the meaning is specialized to 'located in front of the prostate gland'.