Science Define :

A group of hydrocarbons that contains carbons atoms joined together in straight chains, branched chains or simple rings.

When a carbon compound combines with another compound to form a product that contains all the atoms in both the reactants is called as Addition Reaction.

The series of compounds formed by joining the same functional group in the place of a particular hydrogen atom in the chains having sequentially increasing length is called Homologous Series.

The phenomenon in which compounds having different structural formula but have the same molecular formula is called Structural Isomerism.

Carbon has a unique ability to form strong  covalent bonds with other carbon atoms, this results in formation of big molecules. This property of carbon is called Catenation power.