| IR | drop of voltage across a resistor produced by a current; ileal resection; immune response; immunizat... |
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| IRV | inferior radicular vein; inspiratory reserve volume; inverse ratio ventilation |
| ITA | inferior temporal artery; internal thoracic artery; International Tuberculosis Association |
| ITQ | inferior temporal quadrant |
| ITV | inferior temporal vein |
| vena ophthalmica inferior | <anatomy, vein> Arises from the inferior palpebral and lacrimal veins and divides into two terminal branches, one of which runs to the pterygoid plexus while the other joins the superior ophthalmic vein or empties into the cavernous sinus. Synonym: vena ophthalmica inferior. (05 Mar 2000) |
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| vena phrenica inferior | <anatomy, vein> The vein that drains the substance of the diaphragm and empties on the right side into the inferior vena cava, on the left side into the left suprarenal vein; often a second vein on the left side passes transversely across the diaphragm anterior to the oesophageal hiatus to enter the inferior vena cava. Synonym: vena phrenica inferior. (05 Mar 2000) |
| vena pulmonalis inferior dextra | <anatomy, vein> The vein returning oxygenated blood from the inferior lobe of the right lung to the left atrium. Synonym: vena pulmonalis inferior dextra. (05 Mar 2000) |
| vena pulmonalis inferior sinistra | <anatomy, vein> The vein returning oxygenated blood from the inferior lobe of the left lung to the left atrium. Synonym: vena pulmonalis inferior sinistra. (05 Mar 2000) |
| vena thyroidea inferior | <anatomy, vein> Unpaired vein formed by veins from the isthmus and lateral lobe of the thyroid gland and from the plexus thyroideus impar; it terminates in the left brachiocephalic vein. Synonym: vena thyroidea inferior, vena thyroidea ima. (05 Mar 2000) |
| vena ventricularis inferior | Vein draining the deep white matter of the superior and lateral portions of the temporal lobe; it begins in the body of the lateral ventricle and exits from the choroid fissure of the inferior horn where it joins the basal vein. Synonym: inferior ventricular vein. (05 Mar 2000) |
| vena vermis inferior | A vein draining part of the inferior part of the cerebellum; it courses on the inferior surface of the vermis and terminates in the straight sinus. Synonym: vena vermis inferior. (05 Mar 2000) |
| venter inferior musculi omohyoidei | <anatomy> The inferior belly of the omohyoid muscle, attached to the superior border of the scapula. Synonym: venter inferior musculi omohyoidei. (05 Mar 2000) |
| margo inferior | The caudal or lowermost margin of a structure. Synonym: inferior margin, margo inferior. (05 Mar 2000) |
| margo inferior cerebri | The irregular, discontinuous margin of the cerebral hemisphere at the junction of the inferior and superolateral surfaces. Synonym: margo inferolateralis, inferolateral margin. (05 Mar 2000) |
| margo inferior hepatis | The sharp border of the liver that separates the diaphragmatic and visceral surfaces. Synonym: margo inferior hepatis. (05 Mar 2000) |
| margo inferior pancreatis | The border of the pancreas separating the inferior and posterior surfaces. Synonym: margo inferior pancreatis, margo inferior splenis. (05 Mar 2000) |
| margo inferior pulmonis | The sharp border of the lung that separates the diaphragmatic surface from the costal and mediastinal surfaces. Synonym: margo inferior pulmonis. (05 Mar 2000) |
| margo inferior splenis | The border of the pancreas separating the inferior and posterior surfaces. Synonym: margo inferior pancreatis, margo inferior splenis. (05 Mar 2000) |
| venula macularis inferior | A small tributary of the central vein of the retina that drains the lower part of the macula. Synonym: venula macularis inferior. (05 Mar 2000) |