Moving backwards or in an opposite direction to normal. For example, in retrograde ejaculation, semen is forced into the bladder rather than out through the tip of the penis (see ejaculation, disorders of).
Movement in a contrary or backward direction from normal (e.g. a retrograde pyelogram introduces dye into the pelvis of the kidney by passing it up the ureters).
adj. going backwards, or moving in the opposite direction to the normal. (See pyelography.) Retrograde amnesia is a failure to remember events immediately preceding an illness or injury. Compare antegrade.
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