undetectable

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undetectable

(ŭn″di-tek′tă-bĕl)
Not found with contemporary laboratory testing; unmeasurable. The term applies to chemicals, contaminants, pathogens, or toxins in samples of air, blood, other fluids, or tissues.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
After 100 millennia, the [sup.14]C has decayed to an undetectably minute fraction of its original value (less than 6 millionths).
The fact that someone can talk about ideas in this manner--as if they were vitamin B added undetectably to bread, rather than matters to be openly debated--speaks volumes about the structural cynicism of the organisation for which Kelly works.
Critics pointed out that undetectably small impurities in the samples easily could have produced a spurious effect, because crystallization is so sensitive to details of the steps that get it started.
aureus count in tortellini below the detection limit, and the count remained undetectably low in the irradiated samples during all 28 days of storage.
In a world of vastly proliferating "ersatz facsimiles," populated by hollow and lifeless representations, where the photographic or filmic image has lost all referential power, where "the image no longer indexes reality because everyone knows they can be undetectably manipulated by computers," where "the virtualities of the postmodern image seem to constantly elude our grasp," in a realm of dramatically accelerated "visualization," this crisis manifests itself in the "global circulation of images [that] has become an end in itself" (8), producing astronomically large amounts of images which have little if any reference to anything other than themselves and their own process of production and reproduction.
Because these are undetectably low results, they will have no effect on the proportion of results that are greater than the 99th percentile.
Despite warm temperatures and high vector abundance, WNV activity was low during its introductory year (2002), as indicated by low numbers of human cases, undetectably low seasonal MIR, and by low seroprevalence in passerines in 2003.
Chabot is hardly the only queer man I've known who was either undetectably normal or unbelievably macho, neither pretending nor posturing.
25] suggests ways to cheat undetectably, but all of them can be detected with proper engineering.
Another dealer, as a joke, said that mother could reattach crystals better than anyone, absolutely undetectably. The specimen had not been glued, but the collector failed to buy it; the damage was done.