Organic materials are composed of a mixture of carbohydrates, lignins, tannins, fats, oils, waxes, resins, proteins, minerals, and other assorted compounds. With the exception of the mineral fraction, the organic compounds are composed of varying...

An organic compound is a compound containing carbon in combination with one or more elements. Organic compounds are generally characterized by chains of connected carbon atoms. Hydrocarbons contain only carbon and hydrogen, while many other organic...

Substance whose molecules contain one or more (often many more) carbon atoms (excluding carbonates, cyanides, carbides, and a few others; &see; inorganic compound). Until 1828 (&see; urea), scientists believed that organic compounds could be formed...

In organic chemistry, a cyclic compound is one whose molecules consist of three or more atoms joined in a closed ring. A polycyclic compound is one whose molecules contain two or more rings joined to each other. Environmentally, the most important...

These are compounds which contain carbon. It was first thought that organic compounds could only be produced by plants or animals. The great number of organic compounds results from the valence of four of the carbon atom. Carbon atoms can link together...

Class of chemical compounds with carbon bases; all hydrocarbons are organic...

An organic compound is any member of a large class of chemical compounds whose molecules contain carbon. For historical reasons discussed below, a few types of compounds such as carbonates, carbon oxides and cyanides, as well as elemental carbon are...