| parent material | <ecology> The unconsolidated and more or less weathered mineral or organic matter from which the soil profile is developed. (09 Oct 1997) |
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| unconsolidated parent material | <ecology> Material from which a soil develops. (09 Oct 1997) |
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| parent | 1. One who begets, or brings forth, offspring; a father or a mother. "Children, obey your parents in the Lord." (Eph. Vi. 1) 2. That which produces; cause; source; author; begetter; as, idleness is the parent of vice. "Regular industry is the parent of sobriety." (Channing) Parent cell. <biology> A nucleus which, in cell division, divides, and gives rise to two or more daughter nuclei. See Karyokinesis, and Cell division, under Division. Origin: L. Parens, -entis; akin to parere to bring forth; cf. Gr. To give, beget: cf. F. Parent. Cf. Part. Source: Websters Dictionary (01 Mar 1998) |
| parent artery | <anatomy, artery> The artery giving origin to a given artery; the artery of which a given artery is a branch. (05 Mar 2000) |
| parent cell | A cell which, by division, gives rise to two or more daughter cell's. Synonym: brood cell, metrocyte, parent cell. (05 Mar 2000) |
| parent-child relations | The interactions between parent and child. (12 Dec 1998) |
| parent cyst | A hydatid cyst from the inner, or germinal, layer, from which secondary cyst's containing scoleces (daughter cyst's) are developed; sometimes tertiary cyst's (granddaughter cyst's) are developed within the daughter cyst's; occurs most frequently in the liver, but may be found in other organs and tissues; symptoms are those of a tumour of the part affected. Synonym: parent cyst. (05 Mar 2000) |
| single parent | An unmarried natural, adoptive, or substitute parent of a dependent child, whether living with or visiting the child. To be used also for single-parent families. The concept includes the never-married, as well as the divorced and widowed. (12 Dec 1998) |
| barium contrast material | This radiopaque contrast material is either swallowed or given as a enema for the purpose of demonstrating the anatomy of the gastrointestinal tract using X-rays. (27 Sep 1997) |
| base material | Any substance from which a denture base may be made, such as shellac, acrylic resin, vulcanite, polystyrene, metal, etc. (05 Mar 2000) |
| breeder material | <radiobiology> In D-T fusion, refers to lithium or lithium-containing substances which are placed in the blanket to convert the fusion neutrons back into tritium, using nuclear transmutation of lithium isotopes. (09 Oct 1997) |
| by-product material | Radioactive material produced by nuclear fission or by neutron irradiation in a nuclear reactor or similar device. (05 Mar 2000) |
| radiopaque contrast material | A radiopaque substance (for example metal) will be highlighted (appear white) on a plain X-ray. The use of iodine containing radiopaque contrast dyes allow enhancement of the anatomy demonstrable with conventional X-ray. (27 Sep 1997) |
| genetic material | A gene, a part of a gene, a group of genes, or fragments of many genes, on a molecule of DNA, a fragment of DNA, a group of DNA molecules, or fragments of many DNA molecules. Could refer to anything from a small fragment of DNA to the entire genome of an organism. (09 Oct 1997) |
| material | 1. Consisting of matter; not spiritual; corporeal; physical; as, material substance or bodies. "The material elements of the universe." (Whewell) 2. Hence: Pertaining to, or affecting, the physical nature of man, as distinguished from the mental or moral nature; relating to the bodily wants, interests, and comforts. 3. Of solid or weighty character; not insubstantial; of cinsequence; not be dispensed with; important. "Discourse, which was always material, never trifling." (Evelyn) "I shall, in the account of simple ideas, set down only such as are most material to our present purpose." (Locke) 4. <logic> Pertaining to the matter, as opposed to the form, of a thing. See Matter. Material cause. See Cause. Material evidence, evidence which conduces to the proof or disproof of a relevant hypothesis. Synonym: Corporeal, bodily, important, weighty, momentous, essential. Origin: L. Materialis, fr. Materia stuff, matter: cf. F. Materiel. See Matter, and cf. Materiel. Source: Websters Dictionary (01 Mar 1998) |
| piling unmerchantable material | (PUM) A logging contract requirement to remove and pile unmerchantable woody material of a specified size. (05 Dec 1998) |