| primary metabolite | A metabolite excreted during the growth phase. (09 Oct 1997) |
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| primary methemoglobinaemia | Methemoglobinaemia due to formation of any one of a group of abnormal a chain or b chain haemoglobins collectively known as haemoglobin M. Slate-gray cyanosis occurs in early infancy, without pulmonary or cardiac disease, and is resistant to ascorbic acid or methylene blue therapy; autosomal dominant inheritance, methemoglobinaemia due to deficiency of cytochrome b5 reductaseor methemoglobin reductase, the enzyme responsible for reduction of intraerythrocyte methemoglobin; cyanosis is improved by ascorbic acid or methylene blue; autosomal recessive inheritance, one case of methemoglobinaemia has been reported that apparently is due to a deficiency of cytochrome b5. Synonym: hereditary methemoglobinaemia, hereditary methemoglobinaemic cyanosis, primary methemoglobinaemia. (05 Mar 2000) |
| primary myeloid metaplasia | Myeloid metaplasia occurring as the primary condition, often in association with myelofibrosis. Synonym: agnogenic myeloid metaplasia. (05 Mar 2000) |
| primary narcissism | In psychoanalysis, the original psychic energy embodied or invested in the ego. (05 Mar 2000) |
| primary neurasthenia | A form of nervous exhaustion appearing in the adolescent period. Synonym: primary neurasthenia. (05 Mar 2000) |
| primary neuroendocrine carcinoma of the skin | A rare malignant cutaneous tumour seen in sun-exposed skin of elderly patients composed of dermal nodules of small round cells with scanty cytoplasm in a trabecular pattern; the tumour cells contain cytoplasmic dense core granules resembling neurosecretory granules seen in Merkel cells. Synonym: primary neuroendocrine carcinoma of the skin, trabecular carcinoma. (05 Mar 2000) |
| primary neuronal degeneration | <disease> A progressive, neurodegenerative disease characterised by loss of function and death of nerve cells in several areas of the brain leading to loss of cognitive function such as memory and language. The cause of nerve cell death is unknown but the cells are recognised by the appearance of unusual helical protein filaments in the nerve cells (neurofibrillary tangles) and by degeneration in cortical regions of brain, especially frontal and temporal lobes. Alzheimer's disease is the most common cause of dementia. (22 May 1997) |
| primary nodule | A lymphatic nodule having small lymphocytes and lacking a germinal centre. (05 Mar 2000) |
| primary nondisjunction | Nondisjunction occurring in a previously normal cell. (05 Mar 2000) |
| primary nursing care | The primary responsibility of one nurse for the planning, evaluation, and care of a patient throughout the course of illness, convalescence, and recovery. (12 Dec 1998) |
| primary oocyte | <cell biology, gynaecology> The enlarging ovum before maturity is reached, as opposed to the secondary oocyte or polar body. (18 Nov 1997) |
| primary organiser | The organiser situated on the dorsal lip of the blastopore. (05 Mar 2000) |
| primary ovarian follicle | An ovarian follicle before the appearance of an antrum; marked by developmental changes in the oocyte and follicular cells so that the latter form one or more layers of cuboidal or columnar cells; the follicle becomes surrounded by a sheath of stroma, the theca. Synonym: folliculus ovaricus primarius. (05 Mar 2000) |
| primary palate | In the early embryo, the mesoderm-filled shelf, formed from the medial nasal process, that anteriorly separates the oral cavity below from the primitive nasal cavities above. Synonym: primitive palate. (05 Mar 2000) |
| primary pentosuria | essential pentosuria |
| private parts |
genitalia: external sex organ
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| primordium |
an organ in its earliest stage of development; the foundation for subsequent development
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| principal |
the original amount of a debt on which interest is calculated the educator who has executive authority for a school; "she sent unruly pupils to see the principal" star: an actor who plays a principal role capital as contrasted with the income derived from it the major party to a financial transaction at a stock exchange; buys and sells for his own account chief(a): most important element; "the chief aim of living"; "the main doors were of solid glass"; "the principal rivers of America"; "the principal example"; "policemen were primary targets"
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| priapism |
condition in which the penis is continually erect; usually painful and seldom with sexual arousal
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| priapus |
(classical mythology) god of male procreative power and guardian of gardens and vineyards
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| PRI | shrubby California perennial having large pink or violet flowers |
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| PRI | the first or highest or most important or most ostentatious place |
| PRI | feel pride of |
| PRI | native to Asia, Australia, and East Indies, where it provides timber called pyinma |
| PRI | tree of northern India and China having purple blossoms and small inedible yellow fruits |
| PRI | joyful and proud especially because of triumph or success |
| PRI | having or showing arrogant superiority to and disdain of those one views as unworthy |
| PRI | a feeling of self-respect and personal worth |
| PRI | low bench for kneeling on |
| PRI | a clergyman in many Christian churches who has the authority to perform or administer various religious rites |
| PRI | a spiritual leader in a non-Christian religion |
| PRI | in societies practicing shamanism: one acting as a medium between the visible and spirit worlds |