Precursor

Something that precedes, e.g., a sign or symptom that forewarns of another, such as muscle aching may be the precursor of a tremor.

Precursor

The chemical element that changes due to enzymatic or physical pressure.

Precursor

In photochemistry, a compound antecedent to a pollutant. For example, volatile organic compounds (VOCs) and nitric oxides of nitrogen react in sunlight to form ozone or other photochemical oxidants. As such, VOCs and oxides of nitrogen are precursors.
Found on http://www.epa.gov/OCEPAterms/

precursor

[n] - a person who goes before or announces the coming of another
Found on http://www.webdictionary.co.uk/definition.php?query=precursor

precursor

Substance from which another, usually more biologically active, substance is formed.
Found on http://sis.nlm.nih.gov/enviro/iupacglossary/glossaryp.html

Precursor

Any chemical reactant which takes part at any stage in the production of a toxic chemical, including any key component of a binary or multicomponent chemical system.
Found on http://www.chemicalglossary.net/definition/1283-PRECURSOR

Precursor

In metabolism, a chemical substance from which another chemical substance is formed
Found on http://www.chemicalglossary.net/definition/1308-Precursor

Precursor

Material from which carbon fiber is made by pyrolysis. Common precursors are polyacrylonitrile (PAN), rayon and pitch.
Found on http://www.komprex.com/Glossary/index.htm

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-), be...
Found on http://www.medterms.com/script/main/art.asp?articlekey=14105

Precursor

Pre·cur'sor noun [ Latin praecursor , from 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. « Evil thoughts are the invisible, airy prec...
Found on http://www.encyclo.co.uk/webster/P/146

precursor

Something that precedes. ... 1. <biochemistry> In biological processes, a substance from which another, usually more active or mature substance is formed. ... 2. In clinical medicine, a sign or symptom that heralds another. ... Origin: L. Praecursor = a forerunner ... (18 Nov 1997) ...
Found on http://www.encyclo.co.uk/local/20973

precursor

forerunner noun a person who goes before or announces the coming of another
Found on http://wordnetweb.princeton.edu/perl/webwn?s=precursor

precursor

noun a substance from which another substance is formed (especially by a metabolic reaction)
Found on http://wordnetweb.princeton.edu/perl/webwn?s=precursor

precursor

(pre´kәr-sәr) something that precedes. In biological processes, a substance from which another, usually more active or mature substance, is formed. In clinical medicine, a sign or symptom that heralds another.
Found on http://www.encyclo.co.uk/local/21001

Precursor

• (n.) One who, or that which, precedes an event, and indicates its approach; a forerunner; a harbinger.
Found on http://thinkexist.com/dictionary/meaning/precursor/

precursor

(L. praecursor a forerunner) something that precedes. In biological processes, a substance from which another, usually more active or mature substance is formed. In clinical medicine, a sign or symptom that heralds another.
Found on http://users.ugent.be/~rvdstich/eugloss/DIC/dictio70.html

precursor

precursor 1. A person or thing that precedes, as in a job, a method, etc.; a predecessor. 2. A person, animal, or thing that goes before and indicates the approach of someone or something else; a harbinger: 'The budding of tree leaves is a precursor of spring.' 3. A chemical that is transformed into another compound; such as, in the course of a che...
Found on http://www.wordinfo.info/words/index/info/view_unit/1744/5

Precursor

[physics] Therefore, one can determine the approximate period of a precursor waveform at a particular distance and time by calculating the period of the frequency component that would arrive at that distance and time based on its group velocity. In a region of normal dispersion, high-frequency components have a faster group velocity than lo...
Found on http://en.wikipedia.org/wiki/Precursor_(physics)

Precursor

[bird] `Precursor` magnus `Precursor` parvus (type) `Precursor` is a controversial prehistoric bird genus from the Early Eocene{Verify source|date=November 2007}. It was established based on fossils found in England, e.g. in the famous London Clay deposits. Three species have been named, but the supposed `genus` seems to be a chimera compos...
Found on http://en.wikipedia.org/wiki/Precursor_(bird)

Precursor

[chemistry] In chemistry, a precursor is a compound that participates in the chemical reaction that produces another compound. In biochemistry, the term `precursor` is used more specifically to refer to a chemical compound preceding another in a metabolic pathway. ...
Found on http://en.wikipedia.org/wiki/Precursor_(chemistry)

precursor

intermediate material used to form a final superconductor
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=815-05-26

precursor

Type: Term Pronunciation: prē-kŭr′sŏr Definitions: 1. 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 synthesiz...
Found on http://www.medilexicon.com/medicaldictionary.php?t=71749

Precursor

In photochemistry, a compound antecedent to a pollutant. For example, volatile organic compounds (VOCs) and nitrogen oxides react in sunlight to form ozone or other photochemical oxidants. As such, VOCs and oxides of nitrogen are precursors.
Found on http://www.encyclo.co.uk/local/21292

Precursor

A change in the geological or geophysical conditions that is a forerunner to earthquake generation on a fault. Precursors cannot reliably be recognized as such beforehand.
Found on http://earthquakescanada.nrcan.gc.ca/info-gen/glossa-eng.php

Precursor

A substance used as a building block for another substance.
Found on http://www.superglossary.com/Glossary/Health/Vitamins/
No exact match found