| ppm | parts per million; pulses per minute |
|---|---|
| PR | by way of the rectum [Lat. per rectum]; far point [of accommodation] [Lat. punctum remotum]; palindr... |
| PTMPY | per thousand members per year |
| rad/s | rad per second; radian per second |
| cm | centimeter; 1/1000 meter |
| PER | proboscis extension reflex |
|---|---|
| pps | pulse-per-second |
| RPM | revolutions per minute |
| V(M) | volume per protein mass |
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