compound


Also found in: Dictionary, Thesaurus, Legal, Financial, Acronyms, Idioms, Encyclopedia, Wikipedia.

compound

 [kom´pownd]
1. made up of diverse elements or ingredients.
2. a substance made up of two or more materials.
3. in chemistry, a substance made up of two or more elements in union. The elements are united chemically, which means that each of the original elements loses its individual characteristics once it has combined with the other element(s). When elements combine they do so in definite proportions by weight; this is why the union of hydrogen and oxygen always produces water. Sugar, salt, and vinegar are examples of compounds.

Organic compounds are those containing carbon atoms; inorganic compounds are those that do not contain carbon atoms.
clathrate c's inclusion complexes in which molecules of one type are trapped within cavities of another substance, such as within a crystalline lattice structure or large molecule.
quaternary ammonium compound an organic compound containing a quaternary ammonium group, a nitrogen atom carrying a single positive charge bonded to four carbon atoms, e.g., choline.

com·pound

(kom'pownd),
1. chemistry a substance formed by the covalent or electrostatic union of two or more atoms, generally differing entirely in physical characteristics from any of its components.
2. pharmacy denoting a preparation containing several ingredients. For compounds not listed here, see the specific chemical or pharmaceutical names.
[through O.Fr., fr. L. compono]

compound

Chemistry
noun A substance made up of ≥ 2 elements.

Pharmacology
verb To combine two or more active pharmacologic agents into a single preparation, often referred to as a “dosage form”.

compound

Clinical pharmacology verb To combine two or more active pharmacologics to produce a single preparation, often referred to as a dosage form. See Formulation.

com·pound

(kom'pownd)
1. chemistry A substance formed by the covalent or electrostatic union of two or more elements, generally differing entirely in physical characteristics from any of its components.
2. pharmacy A preparation containing several ingredients.

compound

(of plant structures) made up of several similar parts, as in a leaf compound of several leaflets. A simple structure is one not divided into similar parts.

com·pound

(kom'pownd)
1. chemistry a substance formed by the covalent or electrostatic union of two or more atoms, generally differing entirely in physical characteristics from its components.
2. pharmacy denoting a preparation of several ingredients.
References in periodicals archive ?
In order to meet the goal of vein reduction or elimination, the selected vein reduction compounds must produce a high quality casting with sufficient economics for profitability.
With this control flexibility, a wide range of polymers and engineering plastics can be compounded on the same machine without the need to reconfigure screw geometry.
With the exception of cantharidin, these compounds were also AhR agonists in stably transfected Hepa-1 cells, and compounds such as galangin, genistein, daidzein, apigenin, and diosmin that were active in Hepa-1 cells did not induce a response in MCF-7 cells.
Analysis consisted of multiple gas chromatograph-mass spectrometer scans on different extracts of the samples, followed by gas chromatograph confirmation of any compounds observed.
Chemical compounds. Nonylphenol (4-nonylphenol; Aldrich Chemical Company, Milwaukee, WI), octylphenol [4-(tertoctyl)phenol; Aldrich], p,p'-DDE (Aldrich), methoxychlor (Aldrich), [E.sub.2] (Sigma), or 17[alpha]MeT (Sigma) were dissolved in either 100% standard or 95% HPLC grade ethanol (EtOH; Aldrich) or 100% dimethylsulfoxide (DMSO; Fisher, Pittsburgh, PA), and embryos were exposed to a final vehicle concentration of 0.01% EtOH (no differences were noted between the standard and HPLC grade EtOH) or 0.004-0.01% DMSO.
In some cases, a compound will be identified by GC/MS but not found above the quantitation limit in the GC/FID or vice versa.
Now the answer to the question, "Are rubber compounds softer at elevated temperatures?" is not so trivial.
The new compounds inhibit a clot-promoting blood molecule called factor Xa.
PCP represented an average of 66-82% of the concentration of all phenolic compounds in each region.
Most capillary rheometer tests are set up to apply multiple shear rates to the compound during testing, as demonstrated in figure 26.
People can taste this compound at concentrations as low as 0.035 [micro]g per liter, but it can reach 0.5 [micro]g per liter of beer after 3 to 5 months of storage at room temperature.
6-Methoxybenzoxazolinone (MBOA) was identified as a plant secondary compound which was used by montane voles, Microtus montanus, to stimulate reproduction at exactly the appropriate time for food availability to support pup rearing (47-49).