Precursor


Precursor
Forerunner. That which precedes or is derived from an available source. The term "precursor" is applied to an inactive substance converted to an active one (such as an enzyme, vitamin, or hormone). The term "precursor" applies to any chemical that is transformed into another. From the Latin "praecursor," composed of "prae-" (or pre-), before + "curro" to run = to run before.
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That which precedes another or from which another is derived, applied especially to a physiologically inactive substance that is converted to an active enzyme, vitamin, hormone, etc., or to a chemical substance that is built into a larger structure in the course of synthesizing the latter. [L. praecursor, fr. prae-, pre- + curro, to run]

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pre·cur·sor pri-'kər-sər, 'prē-. n
1) one that precedes and indicates the onset of another <angina may be the \precursor of a second infarction>
2) a substance, cell, or cellular component from which another substance, cell, or cellular component is formed esp. by natural processes

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pre·cur·sor (preґkər-sər) [L. praecursor a forerunner] 1. something that precedes. 2. in biological processes, a substance from which another, usually more active or mature substance is formed. 3. in clinical medicine, a sign or symptom that heralds another.

Medical dictionary. 2011.

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  • Precursor — Saltar a navegación, búsqueda Precursor es el término usado por los Testigos de Jehová para designar a los hombres y mujeres que voluntariamente dedican cierta cantidad de horas al ministerio del campo o predicación. El término deriva de la forma …   Wikipedia Español

  • Precursor — or Precursors may refer to:*Precursor (bird), a hypothesized genus of fossil birds that was actually composed of fossilized parts of unrelated animals *Precursor (chemistry), a compound that participates in the chemical reaction that produces… …   Wikipedia

  • precursor — PRECURSÓR, OÁRE, precursori, oare, s.m. şi f. Persoană care pregăteşte, prin activitatea sa, terenul pentru o dezvoltare ulterioară mai largă într un anumit domeniu; deschizător de drumuri; înaintaş, premergător. – Din fr. précurseur. Trimis de… …   Dicționar Român

  • precursor — m. metabol. Sustancia necesaria para fabricar otra de más compleja. Medical Dictionary. 2011. precursor Característica o …   Diccionario médico

  • precursor — I noun advance guard, ancestor, announcer, antecedent, augury, avant courier, forebearer, forefather, foregoer, forerunner, guide, harbinger, herald, omen, parent, pathfinder, patriarch, pioneer, portent, precursor, praenuntius, precedent,… …   Law dictionary

  • precursor — [n1] something that indicates outcome or event beforehand forerunner, harbinger, herald, messenger, outrider, usher, vanguard; concepts 70,278 precursor [n2] something that precedes another ancestor, antecedent, antecessor, forebear, foregoer,… …   New thesaurus

  • Precursor — Pre*cur sor, n. [L. praecursor, fr. praecurrere to run before; prae before + currere to run. See {Course}.] One who, or that which, precedes an event, and indicates its approach; a forerunner; a harbinger. [1913 Webster] Evil thoughts are the… …   The Collaborative International Dictionary of English

  • precursor — precursor. См. предшественник. (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.

  • precursor — precursor, ra adjetivo y sustantivo pionero, iniciador. * * * Sinónimos: ■ iniciador, pionero, antepasado, ascendiente, precedente, adelantado …   Diccionario de sinónimos y antónimos

  • precursor — (n.) early 15c., from L. praecursor forerunner, from praecursus, pp. of praecurrere, from prae before (see PRE (Cf. pre )) + currere to run (see CURRENT (Cf. current)). Related: Precursory …   Etymology dictionary

  • precursor — |ô| adj. s. m. 1. Que ou quem vem à frente. = DIANTEIRO ≠ TRASEIRO 2. Que ou quem vem adiante de alguém para anunciar a sua chegada. 3. Que ou quem anuncia ou prevê um acontecimento futuro. 4. Que ou quem é o primeiro a apresentar determinadas… …   Dicionário da Língua Portuguesa