alkane

"The small twig branched from the older, thicker limb of the apple tree. "

"Gasoline is a hydrocarbon fuel used in many cars. "

"The pencil's lead is made of carbon. "

"the cycle of the seasons, or of the year"

"Cattle emit a large amount of methane."

"After walking home in the driving rain, his clothes were saturated."

"Natural gas used for heating often contains ethane, along with methane and other hydrocarbons. "

"The formula for calculating the area of a rectangle is length times width. "

"The company's new organizational structure is acyclic, meaning employees report to a single supervisor, not a circular hierarchy. "

"The path to the park follows a linear route, going straight down the street. "

"The box contains several important documents. "

"The scientist studied the chemical composition of the soil sample. "