Qinchuan cattle
red or yellow Chinese draft cattle with a cervical hump.
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QRS complex, QRS wave
a group of waves depicted on an electrocardiogram; it actually consists of three distinct waves created by the passage of the cardiac electrical impulse through the ventricles and occurs at the beginning of each contraction of the ventricles. In a normal electrocardiogram the R wave is the most prominent of the three; the Q and S waves may be extremely weak and sometimes are absent.
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qt
quart.
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QT interval
the portion of an electrocardiogram between the onset of the Q wave and the end of the T wave, representing the total time for ventricular depolarization and repolarization.
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quack
slang for a person who misrepresents his/her qualifications as a veterinarian, and therefore ability and experience in diagnosis and treatment of animal disease or the effects to be achieved by the treatment. Refers usually to a person without any qualifications who practices in breach of the local veterinary regulations and is liable to a heavy fine as a result.
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quackery
the practice or methods of a quack.
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quadr(i)-
word element. [L.] four.
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quadrangular
having four angles.
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quadrant
1. one-quarter of the circumference of a circle. 2. one of four corresponding parts, or quarters, as of the surface of the abdomen or of the field of vision.
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quadrate
square or squared.
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