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U - Glossary of Terms
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| U - Glossary of Terms |
| ulcer | (ul'ser) Open, suppurating sore occurring on surface of skin or a mucous membrane, as distinguished from an abscess which is a lesion of deep-seated origin. |
| ulna | The medial and longer of the two bones in the forearm |
| ulnar | This is the preferred term for the medial side of the forearm and hand (see radial) |
| ultraviolet light | Light that is located at the short end of the electromagnetic spectrum between visible light and ionising X-rays; it is beyond the range of human vision. |
| umbilical | (um-bil'i-kal) Of or pertaining to navel, or umbilicus. |
| umbilical region | In the region of the umbilicus (see hypochondriac, epigastric, lumbar, inguinal and hypogastric) |
| umbilical cord | (um-bi´li-kal) A cordlike structure containing the umbilical arteries and vein and connecting the fetus with the placenta. |
| umbilicus | (um-bi-li-kus) The site where the umbilical cord was attached to the fetus; commonly called the navel. |
| unabsorbed | Pertaining to radiography, the term unabsorbed refers to that portion of the X-ray beam that traverses the patient and does not interact with the patient’s tissues. These X-ray photons pass through the patient unaffected and expose the X-ray film, thereby contributing to the creation of the radiographic image. |
| uncontrolled area | Area occupied by anyone; the maximum exposure rate allowed in this area is based on the recommended dose limit for the public. |
| underexposed | Referring to a radiograph that is too light because too little x-radiation reached the image receptor. |
| undifferentiated cell | An immature or a nonspecialised cell. |
| uni- | (u'ni-) Prefix meaning one, single, first; as in unilocular, unidirectional, unigravida |
| unified field theory | The theoretical combination of magnetic, electric, gravitational, and strong nuclear forces along with weak interaction to explain the physical laws of magnetism. |
| unilateral | (u"ni-later-al) Affecting or situated on only one side. |
| unipolar neuron | (yoo´ni-po-lar noor´on) A nerve cell that has a single nerve fiber extending from its cell body. |
| unit | A standard of measurement. |
| universal donor | A person with blood type O who is able to donate blood to people with other blood types in emergency blood transfusions. |
| universal recipient | A person with blood type AB who can receive blood of any type in emergency transfusions. |
| unsharpness | Loss of detail (blur) in a radiographic image. |
| upper extremity | The appendage attached to the pectoral girdle, consisting of the shoulder, brachium, elbow, antebrachium, and hand. |
| urate | Salt of uric acid. |
| urea | (yoo-re´a) The chief nitrogenous waste product of protein catabolism in the urine, formed in the liver from amino acids. |
| uremia | (yoo-re´me-a) The retention of urea and other products of protein catabolism as a result of inadequate kidney function. |
| uresis | (yoo-re'sis) Discharge of urine; urination. |
| ureter | (yoo-re´ter) A tube that transports urine from the kidney to the urinary bladder. |
| ureteral | (yoo-re'ter-al) Pertaining to ureter. |
| urethra | (yoo-re´thra) A tube that transports urine from the urinary bladder to the outside of the body. |
| ureterography | (yoo-re"ter-og'ra-fe) Radiographic examination of ureter after injection of radiopaque solution. |
| urethral | (yoo-re'thral) Pertaining to urethra. |
| urethrogram | (yoo-re-thro-gram) Radiograph of contrast filled urethra. |
| urethrography | (yoo-re-throg'ra-fe) Radiographic examination of urethra during injection of contrast medium or during voiding. |
| -uria | (yoo're-ah) Suffix denoting some relation to urine; as hematuria, dysuria, pyuria. |
| urinary bladder | (yoo´ri-ner´´e) A distensible sac that stores urine, situated in the pelvic cavity posterior to the symphysis pubis. |
| uro- | Prefix denoting some relation to urine or to urinary tract, as in urodynia, urolithiasis. |
| urography | (yoo-rog'ra-fe) Radiographic examination of urinary tract or of any of its parts with contrast medium. |
| urticaria | (ur'ti-ka're-ah) Inflammatory skin disease characterised by transient, whitish wheals on a reddish base, causing intense stinging and itching; uredo; nettle rash; hives. |
| use factor (U) | The proportional amount of time during which the X-ray beam is energised or directed toward a particular barrier. |
| useful beam | The primary radiation used to form the image. |
| uterine | (yoo'ter-in) Of or pertaining to uterus. |
| uterine tube | (yoo´ter-in) The tube through which the ovum is transported to the uterus and the site of fertilization; also called the oviduct or fallopian tube. |
| utero- | (yoo'ter-o-) Prefix denoting some relation to uterus; as uterocele, uteroscope, uteritis. |
| uterography | (yoo'ter-og'ra-fe) Radiographic examination of uterus after injection of contrast medium. |
| uterosalpingography | (yoo'ter-o-sal'ping-og'ra-fe) Radiographic examination of uterus and oviducts after injection of contrast medium; hysterosalpingography. |
| uterus | (yoo´ter-us) A hollow, muscular organ in which a fetus develops. It is located within the female pelvis between the urinary bladder and the rectum; commonly called the womb. |
| utricle | (yoo´tri-k'l) An enlarged portion of the membranous labyrinth, located within the vestibule of the inner ear. |
| uvula | (yoo´vyuu-lua) A fleshy, pendulous portion of the soft palate that blocks the nasopharynx during swallowing. |
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Latest page update: made by AndyC
, Feb 18 2010, 6:31 AM EST
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