| NDF | neutrophil diffraction factor; new dosage form |
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| PAF | paroxysmal atrial fibrillation; peroxisomal assembly factor; phosphodiesterase-activating factor; pl... |
| PDGS | partial form of DiGeorge syndrome |
| PDHa | pyruvate dehydrogenase in active form |
| PEF | peak expiratory flow; Psychiatric Evaluation Form; pulmonary edema fluid |
| lateral wall of orbit | A triangular wall of the orbit formed by the zygomatic bone, the greater wing of the sphenoid bone, and a small part of the frontal bone; posteriorly it is bounded by the superior and inferior orbital fissures. Synonym: paries lateralis orbitae. (05 Mar 2000) |
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| lateral wall of tympanic cavity | The wall formed mainly by the tympanic membrane. Synonym: paries membranaceus cavi tympani, lateral wall of middle ear, membranous wall of middle ear. (05 Mar 2000) |