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PNC

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premature nodal contraction or complex.

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PND

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paroxysmal-nocturnal dyspnea.

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-pnea

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[Gr. pnoia, pnoē, breath, fr. pnein, to breathe] Suffix meaning breath, breathe, or breathing. The variant -pnoea is used outside the U.S.

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PNES

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psychogenic nonepileptic seizure.

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pneum-, pneumo-

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[Gr. pneuma, air, breath] Prefixes meaning air, gas, respiration, pneumonia. SEE: pneumato-; pneumono-.

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pneumatic

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(nū-măt′ĭk) [Gr. pneumatikos, pert. to air] 1. Pert. to gas or air. 2. Pert. to respiration. 3. Pert. to rarefied or compressed air.

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pneumatics

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(nū-măt′ĭks) The branch of physics that is concerned with the physical and mechanical properties of gases and air.

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pneumatization

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(nū″mă-tī-zā′shŭn) The formation of air-filled cavities, usually in bone, e.g., the paranasal sinuses and mastoid sinuses.

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pneumatized

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(noo′mŭ-tīzd, nū′) Filled with air or gas.

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pneumato-, pneumat-

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[Gr. pneuma, stem pneumat-, air, breath] Prefixes meaning air, gas, pneumatic, respiration. SEE: pneum-; pneumono-.

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pneumatocele

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(nū-măt′ō-sēl) [″ + kele, tumor, swelling] 1. A hernia of the lung tissue. 2. A swelling containing gas or air, esp. a swelling of the scrotum. SYN: pneumonocele.

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extracranial p. A collection of gas under the scalp, caused by a fracture of the skull that communicates with a paranasal sinus.

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intracranial p. A collection of gas within the skull. SYN: pneumocephalus; pneumocranium.

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pneumatosis

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(nū″mă-tō′sĭs) [Gr. pneumatosis] The presence of air or gas in an abnormal location in the body.

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p. cystoides intestinalis The presence of thin-walled gas-filled cysts in the intestines. The cause is unknown. The cysts usually disappear but occasionally rupture and cause pneumoperitoneum.

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pneumaturia

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(noo″mă-toor′ē-ă) [Gr. pneuma, air, + ouron, urine] Excretion of urine containing free gas.

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pneumectomy

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(noo″mek′tŏ-mē, nū″) [pneum- + -ectomy] Pneumonectomy.

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pneumocephalus

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(nū″mō-sĕf′ă-lŭs) [Gr. pneuma, air, + kephale, head] Intracranial pneumatocele.

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pneumococcal

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(nū″mō-kŏk′ăl) [″ + kokkos, berry] Concerning or caused by pneumococci.

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pneumococcus

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(nū″mō-kŏkŭs) pl. pneumococci [″ + kokkos, berry] Streptococcus pneumoniae.

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pneumoconiosis

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(noo″mō-kō″nē-ō′sĭs) [pneumo- + coniosis] Any disease of the respiratory tract owing to inhalation of dust particles; an occupational disorder such as that caused by mining or stonecutting. SYN: ...

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