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pickwickian syndrome

(pik-wik′ē-ăn) [Inspired by Joe, an obese character in Pickwick Papers by Charles Dickens.] Obesity hypoventilation syndrome.


[Acronym for patient, intervention, comparison, outcome] A standardized method of determining the value of a proposed health care intervention. The effects of the intervention are typically compared or contrasted with a reference standard.


[Sp. pico, bit, beak] In the International System of Units (SI), a prefix meaning one trillionth (10–12).


(pē″′ kō-kūr′ ē) [pico- + curie] ABBR: pCi. An amount of radiation equal to 10–12 curies. SEE: becquerel.


(pē′kō-gram″, pē′ kŏ-gram″) [pico- + gram] ABBR: pg. 1 × 10–12 g; 1 trillionth of a gram.


(pē″kor″nă-vī′rŭs) [pico-+ RNA + virus] Any of a group of very small ether-resistant viruses that includes enteroviruses and rhinoviruses.


(pik′rat″) [picr(ic) acid + -ate] A salt of picric acid.

picro-, picr-

[Gr. pikros, bitter] Prefixes meaning bitter.


(pik″rō-tok′ sĭn) [picro- + toxin] A stimulant to the central nervous system, no longer used as such, obtained from the seed of the shrub Anamirta cocculus native to the Philippines, Malaysia, New Guinea, and eastern India.


(pik′tŏ-gram″) [L. pictus, painted + -gram] A simple picture, drawing, or illustration to convey information without words. SEE: pictograph.


(pik′tŏ-graf″) [L. pictus, painted + -graph] A set of test pictures used for testing vision in children and illiterate adults. SEE: pictogram.

picture archiving and communication system

ABBR: PACS. Computers or networks dedicated to the storage, retrieval, distribution, and presentation of images.


pediatric intensive care unit


pelvic inflammatory disease; position-indicating device; primary immunodeficiency.


(pē-ā′ dră) [Sp. piedra, stone] Sheathlike nodular masses in the hair of the beard and mustache from growth of either Piedraia hortai, which causes black piedra, or Trichosporon beigelii, which causes white piedra. The masses surround the hairs, which become brittle; hairs may be penetrated by fungus and split. SYN: tinea nodosa.


(pērs) To penetrate body tissue, usually in order to place an ornamental ring or stud on the surface of the skin.

Pierre Robin syndrome

(pyer-rō-ban′) [Pierre Robin, Fr. maxillofacial surgeon, 1867–1950] A congenital ...

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