| ECG | Electro-Cardio-Graphy(-Gram); ½ÉÀüµµ = EKG 1. Conducting System Structu... |
|---|---|
| NPV | negative predictive value; pressure value; negative pressure ventilation; net present value; nuclear... |
| PNP | pancreatic polypeptide; para-nitrophenol; peak negative pressure; pediatric nurse practitioner; peri... |
| CNPV | Continuous Negative Pressure Ventilation |
| GNB | Gram Negative(-) Bacilli |
| CNS | Coagulase Negative Staphylococci |
|---|---|
| CNS | Coagulase Negative Staphylococcus |
| CONS | Coagulase negative staphylococci |
| CNV | Contingent Negative Variation |
| DN | Dominant negative |
| negative | Not affirming the presence of the organism or condition in question (a negative diagnosis). (18 Nov 1997) |
|---|---|
| negative accommodation | The decrease of accommodation that occurs when shifting from near vision to distance vision. (05 Mar 2000) |
| negative afterimage | An afterimage in which the lightness relationship is reversed; if chromatic, it appears in complementary colour. (05 Mar 2000) |
| negative anergy | A reduction of the normal or usual immunologic responses because of unrelated intervening disease. Synonym: non-specific anergy. (05 Mar 2000) |
| negative base excess | A measure of metabolic acidosis, usually predicted from the Siggaard-Andersen nomogram; the amount of strong alkali that would have to be added per unit volume of whole blood to titrate it to pH 7.4 while at 37°C and at a carbon dioxide pressure of 40 mm Hg. (05 Mar 2000) |
| negative binomial distribution | <epidemiology> A distribution which is parameterised by a mean m and an aggregation parameter k which is large when aggregation is small; in fact as k becomes large, the negative binomial distribution approximates the Poisson distribution. (05 Dec 1998) |
| negative control | Regulation of an enzyme activity by an inhibitor of that enzyme or regulation of a protein by repression of transcription. (05 Mar 2000) |
| negative convergence | The slight divergence of the visual axes when convergence is at rest, as when observing the far point or during sleep. (05 Mar 2000) |
| negative cooperativity | Cooperativity in which successive ligand molecules appear to bind with decreasing affinity. (05 Mar 2000) |
| negative crystal | <microscopy> A uniaxial crystal is optically negative if epsilon is less than omega A biaxial crystal is said to be optically negative if gamma minus beta is less than beta is less than beta minus alpha. Otherwise the crystal is positive. (05 Aug 1998) |
| negative electrode | <chemistry, physics> The electrode in an electrochemical cell toward which cations are drawn and where reduction occurs. The negatively charged electrode in a vacuum tube. (16 Mar 1998) |
| negative electrotaxis | Electrotaxis by which an organism is attracted toward an anode or repelled from a cathode. (05 Mar 2000) |
| negative end-expiratory pressure | A subatmospheric pressure at the airway at the end of expiration. (05 Mar 2000) |
| negative eyepiece | <microscopy> An eyepiece in which the real image of the object is formed between the lens elements of the eyepiece. (05 Aug 1998) |
| negative feedback | This occurs where the products of a process can act at an earlier stage in the process to inhibit their own formation. The term was first used widely in conjunction with electrical amplifiers where negative feedback was applied to limit distortion of the signal by the amplification mechanism. Tends to stabilise the process. In contrast to positive feedback. (18 Nov 1997) |
| bone scan: falsely negative metastases | <radiology> Anaplastic tumours, reticulum cell sarcoma, renal cell carcinoma, thyroid carcinoma, histiocytosis, neuroblastoma, multiple myeloma (positive scan usually due to recent or impending fracture) (12 Dec 1998) |
|---|---|
| ventilators, negative-pressure | Body ventilators that assist ventilation by applying intermittent subatmospheric pressure around the thorax, abdomen, or airway and periodically expand the chest wall and inflate the lungs. They are relatively simple to operate and do not require tracheostomy. These devices include the tank ventilators ("iron lung"), portalung, pneumowrap, and chest cuirass ("tortoise shell"). (12 Dec 1998) |
| gram-negative | <microbiology> A common class of bacteria normally found in the gastrointestinal tract that can be responsible for disease in man (sepsis). Bacteria are considered to be gram-negative because of their characteristic staining properties under the microscope, where they either do not stain or are decolourised by alcohol during Gram's method of staining. This is a primary characteristic of bacteria that have a cell wall composed of a thin layer of peptidoglycan covered by an outer membrane of lipoprotein and lipopolysaccharide containing endotoxin. The gram staining characteristics of bacteria have resulted in an important classification system for the identification of bacteria. See: gram-positive (06 Oct 1997) |
| gram-negative aerobic bacteria | <microbiology> A large group of aerobic bacteria which show up as pink (negative) when treated by the gram-staining method. (12 Dec 1998) |
| gram-negative aerobic rods and cocci | <microbiology> A group of gram-negative bacteria consisting of rod- and coccus-shaped cells. They are both aerobic (able to grow under an air atmosphere) and microaerophilic (grow better in low concentrations of oxygen) under nitrogen-fixing conditions but, when supplied with a source of fixed nitrogen, they grow as aerobes. (12 Dec 1998) |
| gram-negative anaerobic bacteria | <microbiology> A large group of anaerobic bacteria which show up as pink (negative) when treated by the gram-staining method. (12 Dec 1998) |
| gram-negative anaerobic cocci | <microbiology> A group of anaerobic coccoid bacteria that show up as pink (negative) when treated by the gram-staining method. (12 Dec 1998) |
| gram-negative anaerobic straight, curved, and helical rods | <microbiology> A group of anaerobic, rod-shaped bacteria that show up as pink (negative) when treated by the gram-staining method. (12 Dec 1998) |
| gram-negative bacteria | <microbiology> Bacteria which lose crystal violet stain but are stained pink when treated by gram's method. (12 Dec 1998) |
| gram-negative bacterial infections | <microbiology> Infections caused by bacteria that show up as pink (negative) when treated by the gram-staining method. (12 Dec 1998) |
| gram-negative chemolithotrophic bacteria | <microbiology> A large group of bacteria including those which oxidise ammonia or nitrite, metabolise sulfur and sulfur compounds, or deposit iron and/or manganese oxides. (12 Dec 1998) |
| gram-negative facultatively anaerobic rods | <microbiology> A large group of facultatively anaerobic, rod-shaped bacteria that show up as pink (negative) when treated by the gram-staining method. (12 Dec 1998) |
| gram-negative oxygenic photosynthetic bacteria | <microbiology> Widely distributed unicellular or multicellular bacteria. The cyanobacteria use chlorophyll a and phycobilins for oxygenic photosynthesis while genera in the prochlorales use both chlorophyll a and b but not phycobilins. (12 Dec 1998) |
| contingent negative variation | An increasing negative shift of the cortical electrical potentials associated with an anticipated response to an expected stimulus. It is an electrical event indicative of a state of readiness or expectancy. (12 Dec 1998) |
| positive-negative pressure breathing | Inflation of the lungs with positive pressure and deflation with negative pressure by an automatic ventilator. (05 Mar 2000) |
Synonyms : Staining, Negative
| negative reinforcer |
negative reinforcing stimulus: a reinforcing stimulus whose removal serves to decrease the likelihood of the response that produced it
Ãâó: wordnet.princeton.edu/perl/webwn
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| negative feedback |
feedback in opposite phase with (decreasing) the input
Ãâó: wordnet.princeton.edu/perl/webwn
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| negative |
characterized by or displaying negation or denial or opposition or resistance; having no positive features; "a negative outlook on life"; "a colorless negative personality"; "a negative evaluation"; "a negative reaction to an advertising campaign" having a negative electric charge; "electrons are negative" expressing or consisting of a negation or refusal or denial having the quality of something harmful or unpleasant; "ran a negative campaign"; "delinquents retarded by their negative outlook on life" not indicating the presence of microorganisms or disease or a specific condition; "the HIV test was negative" reckoned in a direction opposite to that regarded as positive; "negative interest rates" less than zero; "a negative number" damaging: designed or tending to discredit, especially without positive or helpful suggestions; "negative criticism" a reply of denial; "he answered in the negative" a piece of photographic film showing an image with black and white tones reversed veto: vote against; refuse to endorse; refuse to assent; "The President vetoed the bill" minus: involving disadvantage or harm; "minus (or negative) factors"
Ãâó: wordnet.princeton.edu/perl/webwn
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| negative afterpotential |
the period following termination of the spike potential during which there is a lag in the return of the potential of an excitable cell membrane to resting potential.
Ãâó: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| negative anergy |
transient reduction in reactivity to allergens in a sensitized individual, occurring as a result of intervening events, such as cachexia.
Ãâó: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| negative | a piece of photographic film showing an image with black and white tones reversed |
|---|---|
| negative | a reply of denial |
| negative | vote against |
| negative | involving disadvantage or harm |
| negative | expressing or consisting of a negation or refusal or denial |
| negative | reckoned in a direction opposite to that regarded as positive |
| negative | designed or tending to discredit, especially without positive or helpful suggestions |
| negative | having the quality of something harmful or unpleasant |
| negative | characterized by or displaying negation or denial or opposition or resistance |
| negative | (mathematics) less than zero |
| negative | (medicine) not indicating the presence of microorganisms or disease or a specific condition |
| negative | having a negative electric charge |
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