| polycythemia rubra vera | Overproduction (proliferation) of red blood cells due to bone marrow disease (myeloproferative disorder). Pv tends to evolve into acute leukaemia or a condition with the marrow replaced by scar tissue (myelofibrosis) (12 Dec 1998) |
|---|---|
| polycythemia vera | Overproduction (proliferation) of red blood cells due to bone marrow disease (myeloproferative disorder). Pv tends to evolve into acute leukaemia or a condition with the marrow replaced by scar tissue (myelofibrosis) (12 Dec 1998) |
| polycyttaria | <zoology> A division of Radiolaria. It includes those having one more central capsules. Origin: NL, fr. Gr. Many +, dim. Fr. A hollow vessel. Source: Websters Dictionary (01 Mar 1998) |
| polydactylism | <anatomy> The possession of more that the normal number of digits. Origin: Poly- + Gr. Finger: cf. F. Polydactylisme. Source: Websters Dictionary (01 Mar 1998) |
| polydactylous | Relating to polydactyly. (05 Mar 2000) |
| polydactyly | <radiology> Ellis-van Creveld, Laurence-Moon-Biedle, trisomy 13-15, simple polydactyly, Carpenter syndrome, Meckel-Gruber syndrome (12 Dec 1998) |
| polydentia | Synonym: polyodontia. Origin: poly-+ L. Dens, tooth (05 Mar 2000) |
| polydeoxyribonucleotides | A group of 13 or more deoxyribonucleotides in which the phosphate residues of each deoxyribonucleotide act as bridges in forming diester linkages between the deoxyribose moieties. (12 Dec 1998) |
| polydioxanone | <chemical> Poly(oxy(1-oxo-1,2-ethanediyl)oxy-1,2-ethanediyl). An absorbable suture material used also as ligating clips, as pins for internal fixation of broken bones, and as ligament reinforcement for surgically managed ligament injuries. Its promising characteristics are elasticity, complete biodegradability, and lack of side effects such as infections. Chemical name: Poly(oxy(1-oxo-1,2-ethanediyl)oxy-1,2-ethanediyl) (12 Dec 1998) |
| polydipsia | <symptom> Chronic excessive thirst, as in diabetes mellitus or diabetes insipidus. Origin: Gr. Dipsa = thirst (18 Nov 1997) |
| polydispersoid | A colloid system in which the dispersed phase is composed of particles having different degrees of dispersion. (05 Mar 2000) |
| polydnaviridae | A family of insect viruses isolated from endoparasitic hymenopteran insects belonging to the families ichneumonidae and braconidae. The two genera are ichnovirus and bracovirus. (12 Dec 1998) |
| polydysplasia | Tissue development abnormal in several respects. Origin: poly-+ G. Dys-, bad, + plasis, a molding (05 Mar 2000) |
| polydystrophic | Relating to polydystrophy. (05 Mar 2000) |
| polydystrophic dwarfism | <biochemistry, syndrome> An error of mucopolysaccharide metabolism due to deficiency of the lysosomal enzyme arylsulphatase B. It is characterised by excretion of dermatan sulfate in the urine, growth retardation, lumbar kyphosis, sternal protrusion, genu valgum, usually hepatosplenomegaly, and no mental retardation. Onset occurs after two years of age. Inheritance: autosomal recessive. Synonym: polydystrophic dwarfism, mucopolysaccharidosis type VI. (05 Mar 2000) |