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neurotransmitter
(Encyclopedia) neurotransmitter, chemical that transmits information across the junction (synapse) that separates one nerve cell (neuron) from another nerve cell or a muscle. Neurotransmitters are…philosophy of science
(Encyclopedia) philosophy of science, branch of philosophy that emerged as an autonomous discipline in the 19th cent., especially through the work of Auguste Comte, J. S. Mill, and William Whewell.…neoplasm
(Encyclopedia) neoplasm or tumor, tissue composed of cells that grow in an abnormal way. Normal tissue is growth-limited, i.e., cell reproduction is equal to cell death. Feedback controls limit cell…commensalism
(Encyclopedia) commensalismcommensalismkəmĕnˈsəlĭzˌəm [key], relationship between members of two different species of organisms in which one individual is usually only slightly benefited, while the…analogy
(Encyclopedia) CE5 Analogy in bird and insect wings analogy, in biology, the similarities in function, but differences in evolutionary origin, of body structures in different organisms. For…amphoterism
(Encyclopedia) amphoterismamphoterismămˌfətĕrˈĭzm [key], in chemistry, the property of certain substances of acting either as acids or as bases depending on the reaction in which they are involved.…irony
(Encyclopedia) irony, figure of speech in which what is stated is not what is meant. The user of irony assumes that his reader or listener understands the concealed meaning of his statement. Perhaps…Anzengruber, Ludwig
(Encyclopedia) Anzengruber, LudwigAnzengruber, Ludwigl&oobreve;tˈvĭkh änˈtsəngr&oomacr;ˌbər [key], 1839–89, Austrian writer. An actor and a clerk in the imperial police, Anzengruber had…index number
(Encyclopedia) index number, in econometrics, a figure reflecting a change in value or quantity as compared with a standard or base. The base usually equals 100 and the index number is usually…intermezzo
(Encyclopedia) intermezzointermezzoĭntərmĕtˈsō, –mĕdˈzō [key]. 1 Any theatrical entertainment of a light nature performed between the divisions of a longer, more serious work. 2 In the 17th and 18th…Trending
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