J point n.
The point marking the end of the QRS complex and the beginning of the following part that merges into the T wave in an electrocardiogram.
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
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