| BC | Bachelor of Surgery [Lat. Baccal-aureus Chirurgiae]; back care; bactericidal concentration; basal ce... |
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| BCA | balloon catheter angioplasty; bicinchoninic acid; blood color analyzer; Blue Cross Association; bran... |
| BC/BS | Blue Cross/Blue Shield [plan] |
| BCBSA | Blue Cross and Blue Shield Association |
| BCP | basic calcium phosphate; birth control pill; blue cone pigment; Blue Cross Plan; bromcresol purple |
| cross-hybridisation | <molecular biology> The hydrogen bonding of asingle-stranded DNA sequence that is partially but not entirely complementary to a single-stranded substrate. Often, this involves hybridising a DNA probe for a specific DNA sequence to the homologous sequences of different species. (09 Oct 1997) |
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| cross-link | A covalent linkage between two polymers or between two different regions of the same polymer. (05 Mar 2000) |
| cross-linking reagent | <chemistry> Reagents with two reactive groups, usually at opposite ends of the molecule, that are capable of reacting with and thereby forming bridges between side chains of amino acids in proteins; the locations of naturally reactive areas within proteins can thereby be identified; may also be used for other macromolecules, like glycoproteins, nucleic acids, or other. (12 Dec 1998) |
| cross-matching | 1. A test for incompatibility between donor and recipient blood, carried out prior to transfusion to avoid potentially lethal haemolytic reactions between the donor's red blood cells and antibodies in the recipient's plasma, or the reverse; performed by mixing a sample of red blood cells of the donor with plasma of the recipient (major crossmatch) and the red blood cells of the recipient with the plasma of the donor (minor crossmatch). Incompatibility is indicated by clumping of red blood cells and contraindicates use of the donor's blood. 2. In allotransplantation of solid organs (e.g., kidney), a test for identification of antibody in the serum of potential allograft recipients which reacts directly with the lymphocytes or other cells of a potential allograft donor; presence of these antibodies usually, if not always, contraindicates the performance of the transplantation because virtually all such grafts will be subject to a hyperacute type of rejection. (05 Mar 2000) |
| cross-pollination | <botany> Fertilization of a plant from a plant with a different genetic makeup. (09 Oct 1997) |
| cross-reacting agglutinin | An immune agglutinin specific for a group antigen. Synonym: cross-reacting agglutinin. (05 Mar 2000) |
| cross-reacting antibody | <immunology> Antibody specific for group antigens, i.e., those with identical functional groups, antibody for antigens that have functional groups of closely similar, but not identical, chemical structure. (05 Mar 2000) |
| cross-reacting material | <haematology> A substance sufficiently different from a reference substance (R) to have a perceptibly different function from R but sufficiently similar to R that it reacts with anti-R antibodies; e.g., mutant factor VIII may be defective or even inert in coagulation and yet be immunologically identified as factor VIII. (05 Mar 2000) |
| cross-reactive antibody | <haematology, immunology> Antibodies which don't respond to any one specific antigen, but will respond to a number of them. These antibodies can be responsible for false positive results in antigen-antibody tests. (09 Oct 1997) |
| cross-resistance | <immunology, microbiology> Immunologic resistance to the pathogenic effects of a microorganism because of previous exposure to another species or type having cross reactive antigens. This phenomenon is seen in microbes that acquire resistance to one drug through direct exposure and turn out to have resistance to one or more other drugs to which it has not been exposed. Cross-resistance arises because the mechanism of resistance to several drugs is the same and arises through the identical genetic mutations. (09 Oct 1997) |
| cross-section | <physics> Usually refers to the (apparent) area presented by a target particle to an oncoming particle (or electromagnetic wave). This measures the probability of an interaction occuring. For typical interactions between ions and electrons, or between two nuclei, these cross sections are generally measured in barns. <anatomy> A transverse cut through a structure or tissue. The opposite of a cross-section is a longitudinal section. By analogy, a study may be cross-sectional or longitudinal. (12 Dec 1998) |
| cross-sectional echocardiography | two-dimensional echocardiography |
| cross-sectional method | <epidemiology> The study of the life span involving comparison of groups of individuals at different age levels. Compare: longitudinal method. (05 Mar 2000) |
| cross-sectional study | <epidemiology> A study in which the presence or absence of disease or other health-related variables are determined in each member of the study population or in a representative sample at one particular time. This contrasts with longitudinal studies which are followed over a period of time. Synonym: horizontal study. (18 Jul 2002) |
| cross-table lateral projection | <radiology> Lateral projection radiography of a supine subject using a horizontal X-ray beam. (05 Mar 2000) |
Synonyms : Cross-Over Design, Cross-Over Trials, Crossover Design, Crossover Studies, Crossover Trials, Cross Over Design, Cross Over Studies, Cross Over Trials, Cross-Over Designs, Cross-Over Study, Crossover Designs, Crossover Study, Design, Cross-Over, Design, Crossover
Synonyms : Cross Presentation, Cross Priming
Synonyms : Analysis, Cross-Sectional, Cross Sectional Analysis, Cross-Sectional Survey, Surveys, Disease Frequency, Analyses, Cross Sectional, Analyses, Cross-Sectional, Analysis, Cross Sectional, Cross Sectional Analyses, Cross Sectional Studies, Cross Sectional Survey
Synonyms : Cross, Genetic, Genetic Cross, Genetic Crosses
Synonyms : Crossing Over, Crossing-Over, Genetic, Crossing Overs, Genetic Crossing Over, Genetic Crossing-Over
| cross-eye |
strabismus in which one or both eyes turn inward toward the nose
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| cross-fertilization |
fertilization by the union of male and female gametes from different individual of the same species interchange between different cultures or different ways of thinking that is mutually productive and beneficial; "the cross-fertilization of science and the creative arts"
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| crossbreeding |
hybridization: (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids miscegenation: reproduction by parents of different races (especially by white and non-white persons)
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| crossed |
placed crosswise; "spoken with a straight face but crossed fingers"; "crossed forks"; "seated with arms across" (of a check) marked for deposit only as indicated by having two lines drawn across it produced by crossbreeding
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| crossed eye |
cross-eye: strabismus in which one or both eyes turn inward toward the nose
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| cross | to cover a wide area |
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| cross | perversely irritable |
| cross | extending or lying across |
| cross | a rock drill having cruciform cutting edges |
| cross | moderately sweet raised roll containing spices and raisins and citron and decorated with a cross-shaped sugar glaze |
| cross | a long race run over open country |
| cross | the practice of adopting the clothes or the manner or the sexual role of the opposite sex |
| cross | question closely. or question a witness that has already been questioned by the opposing side |
| cross | either of two fine mutually perpendicular lines that cross in the focus plane of an optical instrument and are use for sighting or calibration |
| cross | a Latin cross set on three steps |
| cross | a cross with two crossbars, one above and one below the midpoint of the vertical, the lower longer than the upper |
| cross | remove from a list |