Medical Definition of retrograde
1: characterized by retrogression
2: affecting memories of a period prior to a shock or seizure <retrograde amnesia>
3: occurring or performed in a direction opposite to the normal or forward direction of conduction or flow: asa: occurring along nerve cell processes toward the cell body <retrograde axonal transport> <retrograde degeneration of nerve fibers>b: occurring opposite to the normal direction or path of blood circulation <apply bandaging to the lower extremities to produce pressure to reduce retrograde blood flow in veins with incompetent valves>—compare anterograde 2
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