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periumbilical

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(per″i-ŭm-bil′ĭ-kăl) [peri- + umbilical] Around or near the umbilicus (navel). SYN: paraumbilical.

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periungual

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(per″ē-ŭng′gwăl) [peri- + ungual,] Around a nail.

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periurethral

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(pĕr″ē-ū-rē′thrăl) [″ + ourethra, urethra] Located around the urethra.

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perivascular

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(per″i-vas′kyŭ-lăr) [peri + vascular] Around a vessel, esp. a blood vessel. SYN: angiocentric.

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perivasculitis

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(pĕr″ĭ-văs″kū-lī′tĭs) [perivascul(ar) + -itis] Periangiitis.

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periventricular

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(per″i-ven-trik′yŭ-lăr) Around a ventricle, esp. of the brain. SEE: ventricle.

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perivertebral

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(per″i-vĕrt′ĕ-brăl) [peri- + vertebral] Around a vertebra.

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perivesical

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(per″i-ves′ĭ-kăl) [peri- + vesical] Around the urinary bladder.

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perle

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(pĕrl) [Fr., pearl] A soft capsule containing medicine.

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perlèche

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(pĕr-lĕsh′) [Fr.] Angular cheilosis.

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Perls stain

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(pŭrlz stān) [Max Perls, Ger. pathologist, 1843–1881] A histochemical stain that demonstrates iron when it is present in body tissues.

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permanent

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(pĕr′mă-nĕnt) [″ + manere, to remain] Enduring; without change.

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permanganate

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(pĕr-măn′gă-nāt) Any one of the salts of permanganic acid.

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permeability

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(pĕr″mē-ă-bil′ ĭt-ē) The quality of being permeable; that which may be traversed.

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capillary p. The condition of the capillary wall that enables substances in the blood to pass into tissue spaces or into cells, or vice versa.

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permeable

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(pĕr′mē-ă-b'l) Capable of allowing the passage of fluids or substances in solution. SYN: pervious (1).

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permeation

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(pĕr″mē-ā′shŏn) [L. permeare, to pass through, permeate] Penetration of and spreading throughout an organ, tissue, or space.

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permethrin

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(pĕr-mĕth-rĭn) An insecticide and insect repellent that has been used to treat scabies and lice infestations, and to protect people from tick exposure while working or playing outdoors.

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permissible

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(pĕr-mis′ĭ-bĕl) [L. permissibilis] Acceptable or allowable.

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permselectivity

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(pĕrm″sĕ-lek-tiv′ĭt-ē) [perm(eability) + selectivity] Any limitation of the permeability of a filter, e.g., the renal glomerulus, to the passage of macromolecules.

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permutation

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(pĕr″mū-tā′shŭn) [L. per, completely, + mutare, to change] Transformation; complete change; act of altering objects in a group.

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pernicious

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(pĕr-nish′ŭs) [L. perniciosus, destructive] Very destructive or harmful.

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pernio

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(pĕr′nē-ō) [L.] Chilblain.

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peroneal

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(per″ō-nē′ăl) [perone + -al...

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