| PB | British pharmacopeia [Pharmacopoeia Britannica]; paraffin bath; Paul-Bunnell [antibody]; periodic br... |
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| PBLC | peripheral blood lymphocyte count; premature birth living child; problem-based learning curriculum |
| PCC | Pasteur Culture Collection; percutaneous cecostomy; pheochromocytoma; phosphate carrier compound; pl... |
| pcc | premature chromosome condensation |
| PCD | pacer-cardioverter-defibrillator; papillary collecting duct; paraneoplastic cerebellar degeneration;... |
| zonary placenta | A placenta in the form of a band encircling the interior of the uterus. Synonym: zonary placenta. (05 Mar 2000) |
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| labyrinthine placenta | A placenta in which maternal blood circulates through channels within the foetal syncytiotrophoblast. (05 Mar 2000) |
| foetal placenta | <embryology> Placenta foetalis, the chorionic portion of the placenta, containing the foetal blood vessels, from which the funis develops; specifically, in humans, it develops from the chorion frondosum. Synonym: pars foetalis placentae. (05 Mar 2000) |
| low placenta | Location of the placenta in the lower part of the uterus (womb) so that the placenta partially or completely covers the cervix. Also known as a placenta previa. (12 Dec 1998) |