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ABO Blood-Group System definition: The major human blood type system which depends on the presence or absence of two antigens A and B. Type O occurs when neither A nor B is present and AB when both are present. A and B are genetic factors that determine the presence of enzymes for the synthesis of certain glycoproteins mainly in the red cell membrane.
ABO(H) blood groups definition: the major human blood type system, which depends on the presence or absence of the two antigenic structures, A and B.
ABO Blood Group definition: A blood group system based on recognition of inherited differences in the H antigen as expressed on erythrocytes.
Amygdala definition: Almond-shaped group of basal nuclei anterior to the inferior horn of the lateral ventricle of the brain, within the temporal lobe. The amygdala is part of the limbic system.
amygdala definition: almond-shaped group of basal nuclei anterior to the inferior horn of the lateral ventricle of the brain, within the temporal lobe; part of the limbic system.
Amygdala definition: Subdivision of basal ganglion of telencephalon which is an almond-shaped gray mass in the dorsomedial part of the temporal lobe.
Amygdala definition: An almond-shaped group of basal nuclei anterior to the inferior horn of the lateral ventricle of the brain, within the temporal lobe. The amygdala is part of the limbic system. (MeSH)
blood group definition: classification systems (or schemes) of the different antigens located on erythrocytes; the antigens are the phenotypic expression of the genetic differences characteristic of specific blood groups.
Blood Group definition: A classification of blood based on the presence or absence of inherited antigenic substances on the surface of erythrocytes.
Blood Groups definition: The classification systems (or schemes) based on the different ANTIGENS located on ERYTHROCYTES.
Control Groups definition: Groups that serve as a standard for comparison in experimental studies. They are similar in relevant characteristics to the experimental group but do not receive the experimental intervention.
control group definition: In a clinical trial, the group that does not receive the new treatment being studied. This group is compared to the group that receives the new treatment, to see if the new treatment works.
Control Group definition: A group used as a standard of comparison in a control experiment.
Ethnic Groups definition: A group of people with a common cultural heritage that sets them apart from others in a variety of social relationships.
ethnic group definition: a group of people with a common cultural heritage that sets them apart from others in a variety of social relationships.
Ethnic Group definition: A social group characterized by a distinctive social and cultural tradition that is maintained from generation to generation. They share a common history and origin and a sense of identification with the group. Members of the group have similar and distinctive features in their lifestyle habits and shared experiences. They often have a common genetic heritage which may be reflected in their experience of health and disease.
Focus Groups definition: A method of data collection and a qualitative research tool in which a small group of individuals are brought together and allowed to interact in a discussion of their opinions about topics, issues, or questions.
focus group definition: method of data collection and a qualitative research tool in which a small group of individuals are brought together and allowed to interact in a discussion of their opinions about topics, issues, or questions.
Minority Groups definition: A subgroup having special characteristics within a larger group, often bound together by special ties which distinguish it from the larger group.
Minority Group definition: A minority is a group that is outnumbered by persons who do not belong to it, often people with different nationality, religion, culture or lifestyle from that of the mainstream in the society; racial or ethnic groups officially recognized by the U.S. government as minority populations.
human age group definition: a general term for grouping human age group terms; prefer NTs.
Age Groups definition: Persons classified by age from birth (INFANT, NEWBORN) to octogenarians and older (AGED, 80 AND OVER).
Age Group definition: Subgroups of populations based on age. (NCI)
Age Group definition: Subgroups of populations based on age.
Occupational Groups definition: Members of the various professions (e.g., PHYSICIANS) or occupations (e.g., POLICE).
Peer Group definition: Group composed of associates of same species, approximately the same age, and usually of similar rank or social status.
peer group definition: group composed of associates of approximately the same age, and usually of similar rank, occupation or social status.
Self-Help Groups definition: Organizations which provide an environment encouraging social interactions through group activities or individual relationships especially for the purpose of rehabilitating or supporting patients, individuals with common health problems, or the elderly. They include therapeutic social clubs.
self help organization definition: organizations or groups which provide an environment encouraging social interactions through group activities or individual relationships especially for the purpose of rehabilitating or supporting patients, individuals with common health problems, or the elderly.
support group definition: A group of people with similar disease who meet to discuss how better to cope with their disease and treatment.
support group definition: Organized sources of information and assistance such as focused classes and organizations, telephone reassurance, and reliable Internet sites that address a specific topic such as parenting, alcoholism, obesity, and Alzheimer's disease.
Sensitivity Training Groups definition: A group of people who meet in an unstructured setting to learn about themselves, interpersonal relationships, and group processes and about larger social systems.
Group definition: Any number of entities (members) considered as a unit.
social group definition: group of individuals, assembled or dispersed, who are united by a common social interest, characteristics or attachment and whose actions are interrelated; for a small group of individuals use SMALL SOCIAL GROUP.
Social Group definition: Social Group; people sharing some social relationship.
Population Groups definition: Individuals classified according to their sex, racial origin, religion, common place of living, financial or social status, or some other cultural or behavioral attribute. (UMLS, 2003)
Population Group definition: A group of individuals united by a common factor (e.g., geographic location, ethnicity, disease, age, gender)
group definition: A grouping of resources (personnel, material, or places) to be used for scheduling purposes. May be a pool of like-type resources, a team, or combination of personnel, material and places.
cooperative group definition: A group of physicians, hospitals, or both formed to treat a large number of persons in the same way so that a new treatment can be evaluated quickly. Clinical trials of new cancer treatments often require many more people than a single physician or hospital can care for.