precursor

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pre·cur·sor

 (prĭ-kûr′sər, prē′kûr′sər)
n.
1. One that precedes and indicates, suggests, or announces someone or something to come: Colonial opposition to unfair taxation by the British was a precursor of the Revolution.
2. One that precedes another; a forerunner or predecessor: The new principal's precursor was an eminent educator.
3. A biochemical substance, such as an intermediate compound in a chain of enzymatic reactions, from which a more stable or definitive product is formed: a precursor of insulin.

[Middle English precursoure, from Old French precurseur, from Latin praecursor, from praecursus, past participle of praecurrere, to run before : prae-, pre- + currere, to run; see kers- in Indo-European roots.]

precursor

(prɪˈkɜːsə)
n
1. a person or thing that precedes and shows or announces someone or something to come; harbinger
2. a predecessor or forerunner
3. (Chemistry) a chemical substance that gives rise to another more important substance
[C16: from Latin praecursor one who runs in front, from praecurrere, from prae in front + currere to run]

pre•cur•sor

(prɪˈkɜr sər, ˈpri kɜr-)

n.
1. a person or thing that precedes, as in a job or a method; predecessor.
2. a person, animal, or thing regarded as a harbinger: The first robin is a precursor of spring.
3. a chemical that is transformed into another compound, as in the course of a chemical reaction, and therefore precedes that compound in the synthetic pathway: Cholesterol is a precursor of testosterone.
4. a cell or tissue that gives rise to a variant, specialized, or more mature form.
[1375–1425; late Middle English < Latin]
pre•cur′so•ry, adj.

precursor

Any chemical reactant which takes place at any stage in the production by whatever method of a toxic chemical. This includes any key component of a binary or multicomponent chemical system. See also toxic chemical.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.precursor - a substance from which another substance is formed (especially by a metabolic reaction)
biochemistry - the organic chemistry of compounds and processes occurring in organisms; the effort to understand biology within the context of chemistry
material, stuff - the tangible substance that goes into the makeup of a physical object; "coal is a hard black material"; "wheat is the stuff they use to make bread"
2.precursor - a person who goes before or announces the coming of another
individual, mortal, person, somebody, someone, soul - a human being; "there was too much for one person to do"
predecessor - one who precedes you in time (as in holding a position or office)
3.precursor - something that precedes and indicates the approach of something or someone
indicant, indication - something that serves to indicate or suggest; "an indication of foul play"; "indications of strain"; "symptoms are the prime indicants of disease"

precursor

noun
1. forerunner, pioneer, predecessor, forebear, antecedent, originator Real tennis, a precursor of the modern game, originated in the eleventh century.
2. herald, usher, messenger, vanguard, forerunner, harbinger The deal should not be seen as a precursor to a merger.

precursor

noun
1. One that indicates or announces someone or something to come:
2. One that precedes, as in time:
Translations
PräkursorVorläufer

precursor

[priːˈkɜːsəʳ] Nprecursor(a) m/f

precursor

[priːˈkɜːrr] n
(= person) → précurseur m (= thing) → précurseur m (= event) → précurseur m
a precursor of sth → un précurseur de qch
a precursor to sth → un précurseur de qch
(CHEMISTRY) (also precursor chemical) → précurseur m

precursor

nVorläufer(in) m(f); (= herald: of event etc) → Vorbote m, → Vorbotin f; (in office) → (Amts)vorgänger(in) m(f)

precursor

[ˌpriːˈkɜːsəʳ] nprecursore m

pre·cur·sor

n. precursor-a, predecesor-a, manifestación tal como la aparición de un síntoma o señal antes de desarrollarse una enfermedad;
a. precursor-a, predecesor-a; preliminar.

precursor

n precursor m
References in classic literature ?
One day, taking a pair of shoes to be mended, he saw the cobbler's wife seated by the fire, suffering from the terrible symptoms of heart-disease and dropsy, which he had witnessed as the precursors of his mother's death.
Curious to discover of what strange events these novel sounds might be the precursors, and not a little desirous to catch a sight of the instruments which produced the terrific noise, I accompanied the natives as soon as they were in readiness to depart for the Taboo Groves.
The followers of Chaucer, and the precursors of Shakespeare, are alike real persons to him--old Langland reminding him of Carlyle's "Gospel of Labour." The product of a large store of reading has been here secreted anew for the reader who desires to see, in bird's-eye view, the light and shade of a long and varied period of poetic literature, by way of preparation for Shakespeare, [9] (with a full essay upon whom the volume closes,) explaining Shakespeare, so far as he can be explained by literary antecedents.
The mediaeval burgesses and the small peasant proprietors were the precursors of the modern bourgeoisie.
These two pursuits have thus in a manner been the pioneers and precursors of civilization.
All were apprehensive of worse to come, and this was especially true of the seamen who recalled all sorts of terrible omens and warnings that had occurred during the early part of the voyage, and which they could now clearly translate into the precursors of some grim and terrible tragedy to come.
The countess was accustomed to this tone as a precursor of news of something detrimental to the children's interests, such as the building of a new gallery or conservatory, the inauguration of a private theater or an orchestra.
Claypole thought must be the immediate precursor of a violent fit of crying.
The storm increase, the flashes succeeded one another more rapidly, the thunder began to growl, and the wind, the precursor of a hurricane, whistled in the plumes and the hair of the horsemen.
As he passes in, we have a parting glimpse of his visage, and recognize the crafty smile, which was the precursor of the little joke that he has ever since been playing off at his wife's expense.
Raising a shout of triumph, he sprang toward the defenseless Cora, sending his keen axe as the dreadful precursor of his approach.
One glow of this kind, however, was often the precursor of gloom for many hours afterward; because, when the glow left him, he seemed conscious of a missing sense and power, and groped about for them, as if a blind man should go seeking his lost eyesight.