| retroflexed | Bent backward or posteriorly. Synonym: retroflected. Origin: retro-+ L. Flecto, pp. Flexus, to bend (05 Mar 2000) |
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| retroflexion | Backward bending, as of the uterus when the corpus is bent back, forming an angle with the cervix. Synonym: retroflection. Retroflexion of iris, abnormal position of the iris on the ciliary body after severe concussion. (05 Mar 2000) |
| retrofracted | <botany> Refracted; as, a retrofract stem. Origin: Pref. Retro- + L. Fractus, p. P. Of frangere to break. Source: Websters Dictionary (01 Mar 1998) |
| retrogasserian neurectomy | Division or section of a sensory root of the fifth cranial nerve, accomplished through a subtemporal (Frazier-Spiller operation), suboccipital (Dandy operation), or transtentorial approach. Synonym: retrogasserian neurectomy, retrogasserian neurotomy. (05 Mar 2000) |
| retrogasserian neurotomy | Division or section of a sensory root of the fifth cranial nerve, accomplished through a subtemporal (Frazier-Spiller operation), suboccipital (Dandy operation), or transtentorial approach. Synonym: retrogasserian neurectomy, retrogasserian neurotomy. (05 Mar 2000) |
| retrognathic | Denoting a state in which the mandible is located posterior to its normal position in relation to the maxillae. (05 Mar 2000) |
| retrognathism | Retrusion of the mandible. (12 Dec 1998) |
| retrograde | 1. Moving backward or against the usual direction of flow. 2. Degenerating, deteriorating or catabolic. Origin: L. Gradi = to step (18 Nov 1997) |
| retrograde amnesia | Amnesia in reference to events that occurred before the trauma or disease that caused the condition. (05 Mar 2000) |
| retrograde aortography | Aortography by the injection of contrast medium into the aorta through one of its branches, e.g., the brachial artery, in a direction against normal arterial blood flow. (05 Mar 2000) |
| retrograde axonal transport | <cell biology> The transport of vesicles from the synaptic region of an axon towards the cell body: involves the interaction of MAP1C with microtubules. (11 Jan 1998) |
| retrograde beat | A beat occurring as an electrical activation of a portion of a heart chamber cephalad to the chamber of origin, e.g., an atrial beat triggered by an impulse originating in the ventricle. (05 Mar 2000) |
| retrograde block | Impaired conduction backward from the ventricles or A-V node into the atria. (05 Mar 2000) |
| retrograde cardioplegia | Cardioplegia effected by delivery of solutions via the coronary veins. (05 Mar 2000) |
| retrograde chromatolysis | Synonym: central chromatolysis. (05 Mar 2000) |