1. An increase in size as of chest or lungs. 2. The spreading out of any structure, as a tendon. 3. An expanse; a wide area. [L. ex-pando, pp. -pansus, to spread out]
- clonal e. (klo′nal) production of daughter cells all arising originally from a single cell.
- extensor e. SYN: extensor digital e..
- extensor digital e. a triangular tendinous aponeurosis including the tendon of the extensor digitorum centrally, interosseus tendons on each side, and a lumbrical tendon laterally. It covers the dorsal aspect of the metacarpophalangeal joint and the proximal phalanx. SYN: dorsal hood, extensor aponeurosis, extensor e..
- hygroscopic e. 1. e. due to the absorption of moisture; 2. in dental casting, the addition of water to the surface of the casting investment during setting to increase the size of the mold.
- perceptual e. development of an ability to recognize and interpret sensory stimuli through associations with past similar stimuli; perceptual e. by relaxation of defenses is a goal of psychotherapy.
- setting e. the dimensional increase that occurs concurrently with the hardening of various materials, such as plaster of Paris.
- wax e. in dentistry, a method of expanding wax patterns to compensate for the shrinkage of gold during the casting process.

* * *

ex·pan·sion ik-'span-chən n
1) the act or process of expanding
2) the quality or state of being expanded

* * *

ex·pan·sion (ek-spanґshən) [L. expandere to spread out] 1. the process or state of being increased in extent, surface, or bulk. 2. a region or area of increased bulk or surface. 3. abnormal, excessive occurrence of a triplet repeat.

Medical dictionary. 2011.


Look at other dictionaries:

  • Expansion — Expansion …   Deutsch Wörterbuch

  • expansion — [ ɛkspɑ̃sjɔ̃ ] n. f. • 1584; lat. expansio, de expandere « déployer » 1 ♦ Phys. Accroissement de volume (d un fluide). Expansion de l air, d un gaz par élévation de la température (⇒ dilatation) , par diminution de pression (⇒ décompression) . La …   Encyclopédie Universelle

  • Expansion — Ex*pan sion, n. [L. expansio: cf. F. expansion.] 1. The act of expanding or spreading out; the condition of being expanded; dilation; enlargement. [1913 Webster] 2. That which is expanded; expanse; extend surface; as, the expansion of a sheet or… …   The Collaborative International Dictionary of English

  • Expansion — may refer to: *In physics: ::*expansion of space, ::*thermal expansion, ::*expansion fan. *In computer hardware: an expansion card *In computer programming: JEE5 developing tool in line expansion *In engineering expansion is the increase in the… …   Wikipedia

  • Expansión TV — Saltar a navegación, búsqueda Expansión TV Nombre público Expansión TV Tipo DVB S y DVB C Programación Información Propietario Recoletos País …   Wikipedia Español

  • Expansion — steht für: Expansion des Universums Expansion von Staaten, eine Erweiterung des Staatsgebiets zu Lasten der Nachbarn oder durch Kolonisation (vgl. Europäische Expansion) Expansion (Wirtschaft), das Wachstum im wirtschaftlichen Bereich die… …   Deutsch Wikipedia

  • Expansión — Saltar a navegación, búsqueda Expansión puede hacer referencia a: Expansión (videojuegos), adición a un juego existente; Revista Expansión, revista de negocios mexicana; Expansión (periódico), diario económico español propiedad del grupo… …   Wikipedia Español

  • Expansion — Sf Ausweitung, Vergrößerung erw. fach. (19. Jh.) Entlehnung. Entlehnt aus frz. expansion, dieses aus l. expānsio ( ōnis), einem Abstraktum zu l. expandere ausdehnen , einem Intensivum zu l. pandere (pānsum) ausbreiten und l. ex ; (unregelmäßiges) …   Etymologisches Wörterbuch der deutschen sprache

  • expansión — sustantivo femenino 1. (no contable) Extensión o dilatación de una cosa: Se teme la expansión de los gases tóxicos. Hay que cortar la expansión de la mancha de petróleo en el mar. 2. Manifestación efusiva de un sentimiento o pensamiento: En un… …   Diccionario Salamanca de la Lengua Española

  • Expansión — is a Spanish economic newspaper published by Unidad Editorial.External links* [http://www.expansion.com Expansión web site] …   Wikipedia

  • Expansión — Pays  Espagne Langue Espagnol Périodicité Quotidien Genre Presse économique Éditeur Madrid …   Wikipédia en Français

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