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degeneration |
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degeneration 1. Biology the loss of specialization, function, or structure by organisms and their parts, as in the development of vestigial organs 2. Biology a. impairment or loss of the function and structure of cells or tissues, as by disease or injury, often leading to death (necrosis) of the involved part b. the resulting condition 3. Electronics negative feedback of a signal degeneration [di‚jen·ə′rā·shən] (electronics) The loss or gain in an amplifier through unintentional negative feedback. (medicine) Deterioration of cellular integrity with no sign of response to injury or disease. General deterioration of a physical, mental, or moral state. (statistical mechanics) A phenomenon which occurs in gases at very low temperatures when the molecular heat drops to less than ³⁄₂ the gas constant. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Histologically, schwannomas are well circumscribed and encapsulated, and they may show cystic degeneration. Although rare, these tumors may become massive with extensive cystic degeneration. Retroperitoneal schwannomas typically form large, well-circumscribed masses and frequently undergo cystic degeneration. |
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