| PR | by way of the rectum [Lat. per rectum]; far point [of accommodation] [Lat. punctum remotum]; palindr... |
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| QR | quality review; quantity is correct [Lat. quantum rectum]; quieting response; quinaldine red |
| qr | quadriradial; quantity is correct [Lat. quantum rectum]; quarter |
| qs | as much as will suffice [Lat. quantum sufficit]; sufficient quantity [Lat. quantum satis] |
| ACR | abnormally contracting region; absolute catabolic rate; acriflavine; adenomatosis of colon and rectu... |