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also ar·te·fact  (är′tə-făkt′)
1. An object produced or shaped by human craft, especially a tool, weapon, or ornament of archaeological or historical interest.
2. Something viewed as a product of human conception or agency rather than an inherent element: "Morality is an artifact of human culture, devised to help us negotiate social relations" (Michael Pollan).
3. A phenomenon or feature not originally present or expected and caused by an interfering external agent, action, or process, as an unwanted feature in a microscopic specimen after fixation, in a digitally reproduced image, or in a digital audio recording.
4. An inaccurate observation, effect, or result, especially one resulting from the technology used in scientific investigation or from experimental error: The apparent pattern in the data was an artifact of the collection method.

[Latin arte, ablative of ars, art; see art1 + factum, something made (from neuter past participle of facere, to make; see dhē- in Indo-European roots).]

ar′ti·fac′tu·al (-făk′cho͝o-əl) adj.


a variant of artefactual
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.artifactual - of or relating to artifactsartifactual - of or relating to artifacts    
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Artifactually increased serum bicarbonate values have been reported in cases of rhabdomyolysis in horses and cattle.
And Hanley and colleagues offer a chilling catalogue of the ways that minimally invasive uterine surgery can artifactually "upstage" tumors of the corpus, such as by mechanically extruding neoplastic cells into the surrounding vasculature.
First, blood samples must be kept on ice followed by centrifugation within 30 min to minimize glycolysis and prevent artifactually low glucose concentrations (7).
On the other hand one of our concerns was pro-convulsant activity of aminophylline that artifactually may have contributed to the higher BIS scores in the aminophylline group.
Note that the magic angle effect may artifactually increase the signal of normal tendons oriented approximately 54 degrees in relation to the main magnetic field on sequences with a short time of echo, such as T1- and PD-weighted sequences.
The "hook effect": high concentration of prostate- specific antigen giving artifactually low value on one- step immunoassay.
Because T3 is often a peripheral product, however, nonthyroid illnesses and medications can cause artifactually abnormal results.
higher or lower), scores on the other scale are artifactually constrained to be in the middle range.
how it was constructed, could have artifactually limited its variability.
Other likely contributors to the diminished ORs in users are prodromal symptoms such as headaches and impaired cognition, which may have prevented recent initiation of mobile phone use among subjects with as yet undiagnosed brain tumors, 'lhus, some cases who would otherwise have become short-term users may have remained nonusers, leading to artifactually reduced ORs for brain tumor in phone users, especially short-term users (and low cumulative users, because short-term use will tend to result in low cumulative use).
Importantly, the vesicle flattening we detected is likely to result in artifactually enlarged radii of curvature if negative staining is the only measure of diameter in vesicular and tubular systems.