CH2OH
Primary Pri"ma*ry, a. [L. primarius, fr. primus first: cf. F. primaire. See {Prime}, a., and cf. {Premier}, {Primero}.] 1. First in order of time or development or in intention; primitive; fundamental; original. [1913 Webster]

The church of Christ, in its primary institution. --Bp. Pearson. [1913 Webster]

These I call original, or primary, qualities of body. --Locke. [1913 Webster]

2. First in order, as being preparatory to something higher; as, primary assemblies; primary schools. [1913 Webster]

3. First in dignity or importance; chief; principal; as, primary planets; a matter of primary importance. [1913 Webster]

4. (Geol.) Earliest formed; fundamental. [1913 Webster]

5. (Chem.) Illustrating, possessing, or characterized by, some quality or property in the first degree; having undergone the first stage of substitution or replacement. [1913 Webster]

{Primary alcohol} (Organic Chem.), any alcohol which possess the group {CH2.OH}, and can be oxidized so as to form a corresponding aldehyde and acid having the same number of carbon atoms; -- distinguished from {secondary & tertiary alcohols}.

{Primary amine} (Chem.), an amine containing the amido group, or a derivative of ammonia in which only one atom of hydrogen has been replaced by a basic radical; -- distinguished from {secondary & tertiary amines}.

{Primary amputation} (Surg.), an amputation for injury performed as soon as the shock due to the injury has passed away, and before symptoms of inflammation supervene.

{Primary axis} (Bot.), the main stalk which bears a whole cluster of flowers.

{Primary colors}. See under {Color}.

{Primary meeting}, a meeting of citizens at which the first steps are taken towards the nomination of candidates, etc. See {Caucus}.

{Primary pinna} (Bot.), one of those portions of a compound leaf or frond which branch off directly from the main rhachis or stem, whether simple or compounded.

{Primary planets}. (Astron.) See the Note under {Planet}.

{Primary qualities of bodies}, such are essential to and inseparable from them.

{Primary quills} (Zo["o]l.), the largest feathers of the wing of a bird; primaries.

{Primary rocks} (Geol.), a term early used for rocks supposed to have been first formed, being crystalline and containing no organic remains, as granite, gneiss, etc.; -- called also {primitive rocks}. The terms Secondary, Tertiary, and Quaternary rocks have also been used in like manner, but of these the last two only are now in use.

{Primary salt} (Chem.), a salt derived from a polybasic acid in which only one acid hydrogen atom has been replaced by a base or basic radical.

{Primary syphilis} (Med.), the initial stage of syphilis, including the period from the development of the original lesion or chancre to the first manifestation of symptoms indicative of general constitutional infection.

{Primary union} (Surg.), union without suppuration; union by the first intention. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • Ксилит —         CH2OH (CHOH)3CH2, OH, многоатомный спирт (См. Многоатомные спирты) (пентит), оптически неактивный изомер; бесцветные гигроскопические кристаллы сладкого вкуса, растворимые в воде, спирте, гликолях, уксусной кислоте и пиридине. По… …   Большая советская энциклопедия

  • Hexose — In organic chemistry, a hexose is a monosaccharide with six carbon atoms, having the chemical formula C6H12O6. Hexoses are classified by functional group, with aldohexoses having an aldehyde at position 1, and ketohexoses having a ketone at… …   Wikipedia

  • Hexosa — Las hexosas son monosacáridos (glúcidos simples) formados por una cadena de seis átomos de carbono. Su fórmula general es C6H12O6. Su principal función es producir energía. Un gramo de cualquier hexosa produce unas 4 kilocalorías de energía. Las… …   Wikipedia Español

  • АЦИКЛИЧЕСКИЕ СОЕДИНЕНИЯ — А. МОНОФУНКЦИОНАЛЬНЫЕ СОЕДИНЕНИЯ 1. С1 : металлоорганические соединения. Эти соединения обычно получают двумя методами: а) действием активного металла (Na, Li, Mg, Zn) на органический галогенид, например: или б) действием галогенида менее… …   Энциклопедия Кольера

  • Heptose — Structure de sédoheptulose, un heptose. Un heptose est un ose possédant sept atomes de carbone. On rencontre la forme D de ces composés dans les lipopolysaccharides des parois bactériennes. Ils ont tous la même formule brute C7H14O7 et possèd …   Wikipédia en Français

  • Heptose — Heptosen sind Monosaccharide, deren Kohlenstoffgrundgerüst sieben Kohlenstoff Atome enthält. Sie haben alle die Summenformel C7H14O7 und eine Molare Masse von 210,18 g/mol. Sie unterscheiden sich durch die Art der Carbonyl Funktion. Handelt es… …   Deutsch Wikipedia

  • Спирты или алкоголи — Этим именем называют большую группу органических соединений, которые имеют сходство в химическом отношении с винным спиртом и заключают в своем составе углерод, водород и кислород. Все они суть гидроксильные производные углеводородов или, другими …   Энциклопедический словарь Ф.А. Брокгауза и И.А. Ефрона

  • Alkohole — nennt man Körper, die sich von den Kohlenwasserstoffen der Fettreihe dadurch ableiten, daß an Stelle eines Wasserstoffatoms eine Hydroxylgruppe OH tritt, z.B. CH4 Methan CH3CH3 Aethan CH3OH Methylalkohol CH3CH2OH Aethylalkohol. Man unterscheidet… …   Lexikon der gesamten Technik

  • GLUCIDES — Les glucides, les lipides et les protides sont les trois grandes familles de composés naturels dont le rôle biologique est fondamental. Glucides est le nom moderne de ce que l’on appelait autrefois «saccharides». En fait, les glucides comprennent …   Encyclopédie Universelle

  • Pentose — A pentose is a monosaccharide with five carbon atoms.They either have an aldehyde functional group in position 1 (aldopentoses), or a ketone functional group in position 2 (ketopentoses).The aldopentoses have three chiral centres ( asymmetric… …   Wikipedia

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