nonane

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of various liquid isomers, C₉H₂₀, of the alkane series.

from The Century Dictionary.

• noun A colorless liquid compound of the methane series, CH₃(CH₂)₇CH₃, prepared by the action of hydriodic acid and phosphorus on pelargonic acid. It melts at—51° C., boils at 149.5° C., and is probably present in petroleum.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) One of a group of metameric hydrocarbons C9H20 of the paraffin series; -- so called because of the nine carbon atoms in the molecule. Normal nonane is a colorless volatile liquid, an ingredient of ordinary kerosene.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun organic chemistry Any of vary many isomeric alkanes, of general formula C9H20, having 9 carbon atoms.