| PA | A physician's assistant or, in anatomy, pa stands for posteroanterior: from back-to-front. See: pa X-ray. (12 Dec 1998) |
|---|---|
| PA projection | The standard frontal chest film projection; radiographic skull projection with the petrous ridge superimposed on the orbits. Synonym: posteroanterior projection. (05 Mar 2000) |
| pa X-ray | An X-ray picture in which the beams pass from back-to-front (posteroanterior). As opposed to an ap (anteroposterior) film in which the rays pass through the body from front-to-back. (12 Dec 1998) |
| Paas' disease | A familial skeletal deformation marked by coxa valga, double patella, shortening of the middle and terminal phalanges of fingers and toes, deformities of the elbows, scoliosis, and spondylitis deformans of the lumbar vertebrae; all of these manifestations may be unilateral or bilateral. (05 Mar 2000) |
| Paas, H | <person> German physician, *1900. See: Paas' disease. (05 Mar 2000) |
| PABA | <abbreviation> P-aminobenzoic acid. (05 Mar 2000) |
| pablum | A precooked infant food, a mixture of wheat, oat, and corn meals, wheat embryo, alfalfa leaves, brewers' yeast, iron, and sodium chloride. Origin: L. Pabulum, nourishment, fr. Pasco, to nourish (05 Mar 2000) |
| pabular | Relating to, or of the nature of, pabulum. (05 Mar 2000) |
| pabulum | The means of nutriment to animals or plants; food; nourishment; hence, that which feeds or sustains, as fuel for a fire; that upon which the mind or soul is nourished; as, intellectual pabulum. Origin: L, akin to pascere to pasture. See Pastor. Source: Websters Dictionary (01 Mar 1998) |
| PAC1 phosphatase | <enzyme> An immediate-early mitogen-inducible tyrosine phosphatase; a map kinase phosphatase; amino acid sequence has been determined Registry number: EC 3.1.3.- Synonym: pac-1 (26 Jun 1999) |
| Pac1 ribonuclease | <enzyme> A homolog of e. Coli rnase III from schizosaccharomyces pombe; amino acid sequence given in first source Registry number: EC 3.1.26.- Synonym: rnase pac1, pac1 gene product (26 Jun 1999) |
| paca | <zoology> A small South American rodent (Coelogenys paca), having blackish brown fur, with four parallel rows of white spots along its sides; the spotted cavy. It is nearly allied to the agouti and the Guinea pig. Origin: Pg, from the native name. Source: Websters Dictionary (01 Mar 1998) |
| pacane | <botany> A species of hickory. See Pecan. Source: Websters Dictionary (01 Mar 1998) |
| Pacchioni, Antonio | <person> Italian anatomist, 1665-1726. See: pacchionian bodies, pacchionian corpuscles, pacchionian depressions, pacchionian glands, pacchionian granulations. (05 Mar 2000) |
| pacchionian | Attributed to or described by Pacchioni. (05 Mar 2000) |