名詞 epidural:

1. regional anesthesia resulting from injection of an anesthetic into the epidural space of the spinal cord; sensation is lost in the abdominal and genital and pelvic areas; used in childbirth and gynecological surgery
   同義詞：epidural anesthesia, epidural anaesthesia

形容詞 epidural:

1. on or outside the dura mater
   同義詞：extradural

1. Epidurals are now often used during childbirth.
   現(xiàn)在分娩時常用硬膜外注射。

ep.i.du.ral

adj.（形容詞）
Located on or over the dura mater.
硬腦（疹）膜上的，硬腦（脊）膜外的
n.（名詞）
An injection into the epidural space of the spine.
脊柱硬脊膜間的注射