Failure to develop. If something develops and then wastes away, that is atrophy.
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1. Defective development or congenital absence of an organ or tissue. 2. In hematology, incomplete, retarded, or defective development, or cessation of the usual regenerative process. [G. a- priv. + plasis, a molding]
- congenital a. of thymus SYN: DiGeorge syndrome.
- a. cutis congenita [MIM*107600, *207700, *207730] congenital absence or deficiency of a localized area of skin, with the base of the defect covered by a thin translucent membrane; most often a single area near the vertex of the scalp, but may occur in other areas; underlying structures may also be affected; autosomal inheritance, either dominant or recessive.
- germinal a. SYN: seminiferous tubule dysgenesis.
- gonadal a. congenital absence of essentially all gonadal tissue; the external genitalia and genital ducts are female, but if interstitial cells of Leydig are present, the external genitalia are commonly ambiguous and the genital ducts are female. SEE ALSO: gonadal dysgenesis, gonadal agenesis. Cf.:Klinefelter syndrome, Turner syndrome.
- pure red cell a. a transitory arrest of red blood cell production which may occur in the course of a hemolytic anemia, often preceded by infection, or as a complication of certain drugs; if the arrest persists, severe anemia may result. SEE ALSO: congenital hypoplastic anemia.

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apla·sia (')ā-'plā-zh(ē)ə, ə- n incomplete or faulty development of an organ or part

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total or partial failure of development of an organ or tissue. See also agenesis.
aplastic adj.

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apla·sia (ə-plaґzhə) [a-1 + -plasia] lack of development of an organ or tissue. Cf. agenesis and hypoplasia.

Medical dictionary. 2011.

Look at other dictionaries:

  • aplasia — f. histol. Desarrollo incompleto o defectuoso de un tejido u órgano. Medical Dictionary. 2011. aplasia desarrollo incompleto o defectu …   Diccionario médico

  • Aplasia — (Greek: a not; plésein to form) is defective development resulting in the absence of all or part of an organ.Examples*Aplastic anemia *Acquired pure red cell aplasia *Thymic aplasiaee also*Atrophy *Hyperplasia *Hypoplasia *Neoplasia …   Wikipedia

  • Aplasia — A*pla si*a, n. [NL.; Gr. ? priv. + ? a molding.] (Med.) 1. Incomplete or faulty development. [Webster 1913 Suppl.] 2. (Med.) a defect, retardation, or cessation of the process of generation of blood cells. [PJC] …   The Collaborative International Dictionary of English

  • aplasia — aplasia. См. аплазия. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • aplasia — (n.) 1885, medical Latin, from Gk. a , privative prefix (see A (Cf. a ) (3)), + PLASIA (Cf. plasia) …   Etymology dictionary

  • aplasia — s. f. Falta de desenvolvimento ou atrofia de um órgão …   Dicionário da Língua Portuguesa

  • aplasia — (De a 2 y un der. del gr. πλάσις, formación). f. Med. Carencia total o parcial de un órgano …   Diccionario de la lengua española

  • aplasia — (De a, privativo + gr. plasso, formar.) ► sustantivo femenino MEDICINA Interrupción o ausencia del desarrollo de un tejido o de un órgano. * * * aplasia (del fr. «aplasie») f. Med. Atrofia. * * * aplasia. (De a 2 y un der. del gr. πλάσις,… …   Enciclopedia Universal

  • aplasia — {{#}}{{LM A02948}}{{〓}} {{[}}aplasia{{]}} ‹a·pla·sia› {{《}}▍ s.f.{{》}} {{♂}}En medicina,{{♀}} desarrollo defectuoso de un órgano o de un tejido, generalmente de carácter congénito: • Tiene una aplasia de la médula ósea caracterizada por la… …   Diccionario de uso del español actual con sinónimos y antónimos

  • Aplasia — nebuvimas statusas T sritis gyvūnų raida, augimas, ontogenezė, embriologija atitikmenys: lot. Aplasia ryšiai: platesnis terminas – per lėtas augimas sinonimas – nepakankamumas sinonimas – aplazija …   Veterinarinės anatomijos, histologijos ir embriologijos terminai

  • Aplasia — nebuvimas statusas T sritis embriologija atitikmenys: lot. Aplasia ryšiai: platesnis terminas – per lėtas augimas sinonimas – nepakankamumas …   Medicininės histologijos ir embriologijos vardynas

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