Definition of crime. 1  1 : an illegal act for which someone can be punished by the government; especially : a gross violation of law. 2  2 : a grave offense especially against morality. 3  3 : criminal activity efforts to fight crime.  4 : something reprehensible, foolish, or disgraceful It's a crime to waste good food.
There are three types of unsaturated hydrocarbons: alkenes, alkynes and aromatic hydrocarbons. Alkenes have one or more carbon-carbon double bond.Alkynes have one or more carbon-carbon triple bond, and aromatic hydrocarbons have a benzene or aromatic ring in their structure.ydrocarbons are compounds that only consist of the elements hydrogen and carbon. In this lesson, we will focus on one type of hydrocarbon: unsaturated hydrocarbons, and its three types-alkenes, alkynes and aromatic hydrocarbons.
Noun. 1. aromatic hydrocarbon-a hydrocarbon that contains one or more benzene rings that are characteristic of the benzene series of organic compounds. benzene, benzine, benzol-a colorless liquid hydrocarbon; highly inflammable; carcinogenic; the simplest of the aromatic compounds.