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precursor

The Oxford Pocket Dictionary of Current English | 2009 | Copyright

pre·cur·sor / ˈprēˌkərsər; priˈkər-/ • n. a person or thing that comes before another of the same kind; a forerunner: a three-stringed precursor of the violin| [as adj.] precursor cells. ∎ Biochem. a substance from which another is formed, esp. by metabolic reaction: pepsinogen is the inactive precursor of pepsin.

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"precursor." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 29 May. 2012 <http://www.encyclopedia.com>.

"precursor." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 29, 2012). http://www.encyclopedia.com/doc/1O999-precursor.html

"precursor." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 29, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-precursor.html

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precursor

A Dictionary of Nursing | 2008 | Copyright

precursor (pri-ker-ser) n. a substance from which another, usually more biologically active, substance is formed. For example, trypsinogen is the precursor of the enzyme trypsin.

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"precursor." A Dictionary of Nursing. 2008. Encyclopedia.com. 29 May. 2012 <http://www.encyclopedia.com>.

"precursor." A Dictionary of Nursing. 2008. Encyclopedia.com. (May 29, 2012). http://www.encyclopedia.com/doc/1O62-precursor.html

"precursor." A Dictionary of Nursing. 2008. Retrieved May 29, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O62-precursor.html

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precursor

The Concise Oxford Dictionary of English Etymology | 1996 | | Copyright

precursor XVI. — L. præcursor, f. præcurrere, f. præ- PRE- + currere run; see COURSE, -OR1.

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T. F. HOAD. "precursor." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. 29 May. 2012 <http://www.encyclopedia.com>.

T. F. HOAD. "precursor." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. (May 29, 2012). http://www.encyclopedia.com/doc/1O27-precursor.html

T. F. HOAD. "precursor." The Concise Oxford Dictionary of English Etymology. 1996. Retrieved May 29, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O27-precursor.html

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