| cross | 1. Any figure in the shape of a cross formed by two intersecting lines. Synonym: crux. Synonym: crux of heart. 3. A method of hybridization or the hybrid so produced. Origin: F. Croix, L. Crux (05 Mar 2000) |
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| cross agglutination | Agglutination by antibodies specific for minor (group) antigens common to several microorganisms, each of which possesses its own major specific antigen. Synonym: cross agglutination. (05 Mar 2000) |
| cross circulation | The circulation in a portion of the body of one individual of blood supplied from another individual. (12 Dec 1998) |
| cross contamination | <dentistry> Passing bacteria or viruses indirectly from one patient to another through the use of improper sterilisation procedures, unclean instruments, or recycling of products. (08 Jan 1998) |
| cross flap | A skin flap transferred from one part of the body to a corresponding part, as from one arm to the other. (05 Mar 2000) |
| cross hybridization | Annealing of a DNA probe to an imperfectly matching DNA molecule. (05 Mar 2000) |
| cross infection | <microbiology> Infection transmitted between individuals infected with different pathogenic microorganisms. Any infection which a patient contracts in a health-care institution. (12 Dec 1998) |
| cross linking | 1. <chemistry> The linking of the chains of a polymer to one another so that the polymer, as a network, becomes stronger and more resistant to being dissolved. 2. <molecular biology> The abnormal linking of two strands of DNA by covalent bonds (as opposed to the normal hydrogen bonds between base pairs), which can occur by exposure to X-rays. Such linking is a type of damage to the DNA molecule and must be repaired before the DNA can replicate and function properly again. (09 Oct 1997) |
| cross reaction | <haematology, immunology> Serological reactions in which an antiserum against one antigen reacts with a non-identical but closely related antigen. (12 Dec 1998) |
| cross tolerance | <pharmacology> The resistance to one or several effects of a compound as a result of tolerance developed to a pharmacologically similar compound. (05 Mar 2000) |
| cross-cultural comparison | Comparison of various psychological, sociological, or cultural factors in order to assess the similarities or diversities occurring in two or more different cultures or societies. (12 Dec 1998) |
| cross-cultural psychiatry | A field of psychiatry with interest in the study of psychological and psychiatric phenomena as differentially expressed in the cultures of different countries. (05 Mar 2000) |
| cross-cut bur | A bur with blades located at right angles to its long axis. (05 Mar 2000) |
| cross-dressing | Clothing oneself in the clothes of the opposite sex. See: transvestism. (05 Mar 2000) |
| cross-eye | Alternative spelling for crossed eyes. (05 Mar 2000) |
| American Red Cross | The national Red Cross society of the United States, established by Congress to assist in caring for the sick and wounded, serving as a communications link between members of the U.S. Armed forces and their families, conducting disaster relief and prevention programs, and furnishing other humanitarian services, the largest of which is a network of regional blood centres providing blood and blood products. (05 Mar 2000) |
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| anatomy, cross-sectional | Descriptive anatomy based on three-dimensional imaging of the body, organs, and structures using a series of computer multiplane sections, displayed by transverse, coronal, and sagittal analyses. It is essential to accurate interpretation by the radiologist of such techniques as ultrasonic diagnosis, magnetic resonance imaging, and computed tomography. (12 Dec 1998) |
| back cross | <genetics> A crossing of a heterozygous organism and one of its homozygous parents. (09 Oct 1997) |
| blue cross | A prepaid health insurance plan for hospital costs and related services. It usually excludes physicians' services (which are covered under blue shield). (12 Dec 1998) |
| red cross | An international agency providing various humanitarian services. (12 Dec 1998) |
| collision cross-section | <radiobiology> Effective surface area of a particle when it collides with another, describes probability of collisions between the two particles. (09 Oct 1997) |
| section, cross | A transverse cut through a structure. The opposite is a longitudinal section. (12 Dec 1998) |
| holy cross | The cross as the symbol of Christ's crucifixion. Congregation of the Holy Cross, a community of lay brothers and priests, in France and the United States, engaged chiefly in teaching and manual Labour. Originally called Brethren of St. Joseph. The Sisters of the Holy Cross engage in similar work. Holy-cross day, the fourteenth of September, observed as a church festival, in memory of the exaltation of our Savior's cross. Source: Websters Dictionary (01 Mar 1998) |
| study, cross-sectional | A study done at one time, not over the course of time. A cross-sectional study a disease such as aids might be designed to learn its prevalence and distribution within the population at one point in time. Also known as a synchronic study. (12 Dec 1998) |
| double back cross | A mating that is a back cross at each of two loci of interest; of special value and importance in linkage analysis. (05 Mar 2000) |
| International Committee of the Red Cross | A neutral Swiss organization serving as an intermediary between contending forces in armed conflict, in civil war, or internal strife, to help victims receive protection and other humanitarian assistance under the Geneva Conventions in accordance with the fundamental principles of the Red Cross. (05 Mar 2000) |
| test cross | Crossing of an unknown genotype to a recessive homozygote so that the phenotype of the progeny corresponds directly to the chromosomes carried by the parents of unknown genotype. In experimental genetics, a deliberate mating designed to test claims about the pattern of inheritance of one or more traits. Synonym: backcross. (05 Mar 2000) |
| League of Red Cross Societies | The international federation of national Red Cross and similar societies. (05 Mar 2000) |