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A child who is protected by governmental agencies and made ready for adoption after abandonment, abuse, or neglect in his or her home. SYN: waiting child.
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(spesh′ăl-tē) The branch of medicine, surgery, dentistry, or nursing in which a specialist practices.
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(spē″sē-ā′shŏn, spē″shē-ā′shŏn) 1. The evolutionary process by which new species of living organisms are formed. 2. The identification of the species of an organism, e.g., of an infectious bacterium.
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sympatric s. Divergence of two related species from a common local ancestor.
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(spē′s(h)ēz″) [L. species, a kind] ABBR: sp. In biology, a category of classification for living organisms just below the genus. Members of a species are usually capable of interbreeding.
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The characteristics of a species, esp. the immunological nature that differentiates that species from another.
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(spĕ-sif′ik) [L. specificus, pert. to a kind] 1. Pert. to a remedy that has a curative effect on a particular disease or symptom. 2. Pert. to a species. 3. Pert. to a disease that is always caused by the same organism. 4. Restricted, explicit; not generalized.
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specific dynamic action of food
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ABBR: sp. gr. The mass of a substance compared with the mass of an equal volume of water. For solid and liquid materials, water is used as a standard and considered to have a specific gravity of 1.000. For gases, the weight per unit volume is compared with that of dry air at a specified temperature and usually at atmospheric pressure. SYN: relative density.
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(spes″ĭ-fis′ĭt-ē) 1. The state of being specific; having a relation to a definite result or to a particular cause. 2. The ability of a test to exclude those who are truly free of a disease or condition. It is a test that reports negative when the characteristic looked for is absent.
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antigenic s. The property of mature B and T lymphocytes that enables them to respond to specific foreign antigens entering the body. Antigen specificity requires mature B and T cells that have been previously exposed to the antigen and, therefore, are able to recognize it again and respond by neutralizing or destroying it. The exact process by which B lymphocytes become capable of recognizing and responding to antigens is unknown. Development of antigen specificity by T cells requires macrophage processing of the antigen for recognition.
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diagnostic s. For a diagnostic or screening test, the proportion of people ...