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at the stroke of (some specific time)

Exactly at a specific time, especially the very beginning of the hour. The store is opening its doors at the stroke of midnight for the Black Friday sale. If you're not home at the stroke of 11, you're grounded!
See also: of, specific, stroke

on the stroke of (some specific time)

Exactly at a specific time, especially the very beginning of the hour. The store is opening its doors on the stroke of midnight for the Black Friday sale. If you're not home on the stroke of 11, you're grounded!
See also: of, on, specific, stroke
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

bricks shy of a load

Mentally impaired, either unintelligent or merely eccentric. For example, He may be handsome but he's not too bright-a few bricks shy of a load. This term, transferring a light load to lightweight mental capacity, is usually preceded by either a few or a specific number such as two . [Slang; 1960s]
See also: brick, load, of, shy
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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References in periodicals archive ?
The implications of this increase in specificity and sensitivity also translates into more consistent monitoring capabilities.
Table-2: Sensitivity and Specificity of Specific CT Findings to Differentiate Tuberculosis From Carcinomatosis (N=98).
Sensitivity, specificity, positive predictive value and negative predictive values were calculated using 2x2 contingency tables on SPSS v 20.
Small differences in assay specificity make a large difference in the accuracy of a result, mostly due to the very low prevalence of autoimmune diseases in general.
With a different cutoff, the sensitivity and specificity will be different.
(4) In other words, the ROC is a visual and mathematical model to express the combination of sensitivity and specificity on a scale from 0 to 1.
Sensitivity of 79.2% and specificity of 70.7% were achieved.
This suggests that with advancing pregnancy the sensitivity of RI goes on increasing, whereas the specificity goes on decreasing.
For any diagnostic test, sum of specificity and false positive rate is always equal to 1.
Thus, ICT malaria showed 93.75% sensitivity and 95.00% specificity for detection of malarial parasites.
The aim of this study was to assess the sensitivity, specificity, and diagnostic accuracy of integrated PET-CT in the evaluation of SPNs and masses in an area with a very high TB incidence.
Medicare claims will not be denied for "unintentional errors" in specificity during the first year that ICD-10 is in place, according to a blog post on the American Medical Association (AMA) website by AMA President Steven J.
A/Magnetic resonance imaging (MRI) has a higher sensitivity and specificity (90% and 79%) than plain radiography (54% and 68%) for diagnosing diabetic foot osteomyelitis.
PET scans using radio-labeled flutemetamol were safe to use in vivo and confirmed the presence or absence of neuritic beta-amyloid levels "with high sensitivity and specificity" in a phase III trial involving 68 terminally ill older adults.
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