cone cone cell retinal cone | a visual receptor cell in the retina that is sensitive to bright light and to color |
rod rod cell retinal rod | a visual receptor cell that is sensitive to dim light |
retinal scanning | biometric identification by scanning the retina of the eye, identification by retinal scanning is complicated by eye movements |
acute accent acute ague | a mark (') placed above a vowel to indicate pronunciation |
necrosis mortification gangrene sphacelus | the localized death of living cells (as from infection or the interruption of blood supply) |
acute triangle acute-angled triangle | a triangle whose interior angles are all acute |
acute angle | an angle less thandegrees but more than degrees |
acute brain disorder acute organic brain syndrome | any disorder (as sudden confusion or disorientation) in an otherwise normal person that is due to reversible (temporary) impairment of brain tissues (as by head injuries or drugs or infection) |
acute renal failure acute kidney failure | renal failure associated with burns or other trauma or with acute infection or obstruction of the urinary tract |
poliomyelitis polio infantile paralysis acute anterior poliomyelitis | an acute viral disease marked by inflammation of nerve cells of the brain stem and spinal cord |
severe acute respiratory syndrome SARS | a respiratory disease of unknown etiology that apparently originated in mainland China in , characterized by fever and coughing or difficulty breathing or hypoxia, can be fatal |
acute leukemia | rapidly progressing leukemia |
acute lymphocytic leukemia acute lymphoblastic leukemia | acute leukemia characterized by proliferation of immature lymphoblast-like cells in bone marrow, lymph nodes, spleen, and blood, most common in children |
acute myelocytic leukemia acute myeloid leukemia | acute leukemia characterized by proliferation of granular leukocytes, most common in adolescents and young adults |
acute glaucoma closed-angle glaucoma anglelosure glaucoma | glaucoma in which the iris blocks the outflow of aqueous humor, closed-angle glaucoma can cause a rapid buildup of high intraocular pressure that results in permanent visual damage in a couple of days |
dry gangrene cold gangrene mumification necrosis mummification | (pathology) gangrene that develops in the presence of arterial obstruction and is characterized by dryness of the dead tissue and a dark brown color |
gas gangrene clostridial myonecrosis emphysematous gangrene emphysematous phlegmon gangrenous emphysema gas phlegmon progressive emphysematous necrosis | (pathology) a deadly form of gangrene usually caused by clostridium bacteria that produce toxins that cause tissue death, can be used as a bioweapon |
acute hemorrhagic encephalitis | encephalitis that resembles apoplexy due to blood extravasation |
herpes simplex encephalitis herpes encephalitis acute inclusion body encephalitis | common form of acute encephalitis caused by herpes simplex , usually affects the temporal and frontal lobes |
acute gastritis | gastritis caused by ingesting an irritant (as too much aspirin) |
acute glossitis | glossitis resulting from injury or infection and characterized by swelling and pain |
acute schizophrenic episode reactive schizophrenia | schizophrenia of abrupt onset and relatively short duration (a few weeks or months) |
retinal detachment detachment of the retina detached retina | visual impairment resulting from the retina becoming separated from the choroid in the back of the eye, treated by photocoagulation |
acute pyelonephritis | pyelonephritis resulting from the spread of a bladder infection |
tumor necrosis factor tumour necrosis factor TNF | a proinflammatory cytokine that is produced by white blood cells (monocytes and macrophages), has an antineoplastic effect but causes inflammation (as in rheumatoid arthritis) |
retinene retinal | either of two yellow to red retinal pigments formed from rhodopsin by the action of light |
visual purple rhodopsin retinal purple | a red photopigment in the retinal rods of vertebrates, dissociates into retinene by light |
acute | having or experiencing a rapid onset and short but severe course, acute appendicitis, the acute phase of the illness, acute patients |
acute | of critical importance and consequence, an acute (or critical) lack of research funds |
acute intense | extremely sharp or intense, acute pain, felt acute annoyance, intense itching and burning |
acute discriminating incisive keen knifelike penetrating penetrative piercing sharp | having or demonstrating ability to recognize or draw fine distinctions, an acute observer of politics and politicians, incisive comments, icy knifelike reasoning, as sharp and incisive as the stroke of a fang, penetrating insight, frequent penetrative observations |
acuate acute sharp needlelike | ending in a sharp point |
acute | of an angle, less than degrees |
retinal | in or relating to the retina of the eye, retinal cells |