| PEL | inflammation of the female pelvic organs (especially the Fallopian tubes) caused by infection by any of several microorganisms (chiefly gonococci and chlamydia) |
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| PEL | measuring instrument for performing pelvimetry |
| PEL | measurement of the dimensions of the bony birth canal (to determine whether vaginal birth is possible) |
| PEL | a structure shaped like a funnel in the outlet of the kidney into which urine is discharged before passing into the ureter |
| PEL | the structure of the vertebrate skeleton supporting the lower limbs in humans and the hind limbs or corresponding parts in other vertebrates |
| PEL | large primitive reptile having a tall spinal sail |
| PEL | edaphosaurus |