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queen's rook (chess)
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


abbreviation for
(Military) Queen's Regulations


symbol for
(Chess & Draughts) queen's rook
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


pl. qrs.
1. quarter.
2. quire.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
When every other P-wave is not followed by a QRS complex in second-degree AV block (the impulse does not conduct through to the ventricle), it is not possible to differentiate Mobitz Type I from Mobitz Type II AV block using a rhythm strip.
The deal will cover the entire QRS, including the Gimbal context aware proximity platform.
Digital filter of the QRS detector, the most copiously used processing element, is implemented in this paper.
For each averaged waveform, the ratio between the T wave height (measured from the level of the PQ interval) and the total QRS amplitude was calculated (T/QRS ratio, Figure 1).
QRS durations and PR intervals were longer in the jet and helicopter pilots.
This vector magnitude composite was used to measure filtered QRS duration (QRS), duration of low-amplitude signal (LAS) below 40 pV and root mean square voltage of the last 40 milliseconds (ms) of the QRS (RMS40).
Over the course of the past month QRS has released three new devices, the Orbit[TM] Portable Spirometer, Opti[TM] 24-Hour Ambulatory Blood Pressure Monitor and Q200/HE[TM] combination Holter and Event Digital Recorder, expanding their Cardio-Pulmonology Suite.
Hilal Al-Sayer with QRS' General Secretary Ali Al-Hammadi
An electrocardiogram showed that her initial rhythm was atypical atrial flutter with an excessively wide QRS complex of 280 milliseconds, and QRS morphology (lead aVR) was suggestive of potential flecainide toxicity (Figure 1a).
In the present study, it was observed that the most frequent ECG changes were P-pulmonale and Right Axis Deviation of QRS complex seen in grade II and III severity, which is statistically significant.
Typically, in the ECG delineation process, the algorithm firstly detects the QRS complex [1], which is the most pronounced wave of the heartbeat.