epidural block n.
- Epidural hematoma
epidural hematoma n. See extradural hemorrhage.
- Epidural space
epidural space n. The space between the walls and the dura mater of the vertebral canal.
epidurography ep·i·du·rog·ra·phy (ěp’ĭ-du-rŏg’rə-fē, -dyu-) n. Radiographic visualization of the epidural space following the introduction of a radiopaque contrast medium.
epifauna (ěp’ə-fô’nə) Benthic animals that live on the surface of a substrate, such as rocks, pilings, marine vegetation, or the sea or lake floor itself. Epifauna may attach themselves to such surfaces or range freely over them, as by crawling or swimming. Mussels, crabs, starfish, and flounder are epifaunal animals. Compare infauna.