organizer

1. Originally applied to a group of cells on the dorsal lip of the blastopore, which induce differentiation of cells in the embryo and control growth and development of adjacent parts. 2. Any group of cells having such a controlling influence, the effects being brought about through the action of an evocator.
- nucleolar o. the region of the satellites on the acrocentric chromosomes that is active in nucleolus formation. SYN: nucleolar zone, nucleolus o..
- nucleolus o. SYN: nucleolar o..
- primary o. the o. situated on the dorsal lip of the blastopore.

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or·ga·niz·er also Brit or·ga·nis·er -.nī-zər n
1) one that organizes
2) a region of a developing embryo (as the chordamesoderm of the dorsal lip of the vertebrate blastopore) or a substance produced by such a region that is capable of inducing a specific type of development in undifferentiated tissue called also inductor

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or·ga·niz·er (orґgə-nīz″ər) a part of an embryo that so influences some other part as to bring about and direct its histological and morphological differentiation. Parts developing as a result of induction, and inducing in their turn are classified as organizers of the second grade, third grade, and so on. Cf. activator (def. 2) and inductor.

Medical dictionary. 2011.

Look at other dictionaries:

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  • Organizer — Or gan*i zer, n. One who organizes. [1913 Webster] …   The Collaborative International Dictionary of English

  • organizer — organizer. См. организатор. (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.

  • organizer — index architect, author (originator), chief, developer, promoter Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • organizer — (n.) 1849, agent noun from ORGANIZE (Cf. organize) …   Etymology dictionary

  • organizer — (Amer.) or·gan·iz·er || É”rgÉ™naɪzÉ™(r) / ɔːg n. planner, one who organizes; person who enlists workers to join a union; schedule planner book; container with compartments for storing articles; (Embryology) part of an embryo that stimulates …   English contemporary dictionary

  • organizer — /orɡəˈnaizer, ingl. ˈɔːɡəˌnaɪzə(r)/ s. m. inv. 1. agenda 2. (elab.) computer palmare, agenda elettronica …   Sinonimi e Contrari. Terza edizione

  • organizer — [n] planner arranger, coordinator, designer, developer, facilitator, promoter; concept 347 …   New thesaurus

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