NULL


Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Idioms, Encyclopedia, Wikipedia.
Related to NULL: null space
AcronymDefinition
NULLNation Under Lethal Limitations (clothing company)
NULLNovell Users of Lincoln Land (Illinois)
References in periodicals archive ?
Assuming that categories defined by SF-1 staining (Pit-1/ ACTH-negative, ie, gonadotroph adenomas), ACTH-staining (Pit-1/SF-1-negative, ie, corticotroph adenomas), and Pit-1/SF-1/ACTH-negative tumors (IHC null cell adenoma, see discussion) can be studied with only the screening antibodies and review of clinical and serologic history, approximately one-third fewer stains might be used in the characterization of pituitary adenoma in our system, given the prevalence of adenoma subtypes noted in the current series (Tables 4 and 5, compare Total Stains, Prior System, and Total Stains, New Algorithm).
Computation of a single hypothesis test involves defining a null hypothesis [H.sub.0], which will be rejected in favor of an alternative hypothesis [H.sub.A] if a sufficiently extreme value of the test statistic is observed (e.g., Wilks 2011).
It is well-known that the null hypersurfaces have been used as physical models of black hole horizons in general relativity.
Null thinks that the standard American diet, chock-full of sugary pastries, sodas, and candies, is the key culprit in creating insulin resistance.
The results were scanned for inconsistencies of the type encountered when null alleles are segregating.
When a value isn't entered into a field, it's a null value.
However, nulls steering and null depth are not taken into account, which are very important issues to be addressed.
The alternative hypothesis is often what we are hoping to prove by gathering enough evidence to overturn the null hypothesis.
Recall that a vector v [member of] [E.sup.4.sub.1] can be spacelike if g(v, v) > 0 or v = 0, timelike if g(v, v) < 0, and null (lightlike) if g(v, v) = 0 and v [not equal to] 0.
So, why does the science community continue to do attribution studies and assume that humans have no influence as a null hypothesis?
Since g is an indefinite metric, recall that a vector v [member of] [E.sup.3.sub.1] can have one of three Lorentzian characters: it can be space-like if g(v,v) > 0 or v = 0, time-like if g(v,v) < 0 and null if g(v,v) - 0 and v [not equal to] 0.