ep ‧ i ‧ dur ‧ al /ˌepɪˈdjʊərəl◂ $ -ˈdʊr-/ BrE AmE noun [countable]
[ Date: 1800-1900 ; Origin: epi- ( ↑ epicenter ) + dura , from dura mater 'outer covering of the main nerve in the back' (14-21 centuries) , from Latin , 'hard mother' ]
a drug that is put into your back using a needle, done to prevent you feeling pain, especially when having a baby