Ketones are organic compounds that contain a carbonyl group (C=O) bonded to two alkyl groups. There is no shortage of synonyms for this compound. For instance, it is sometimes called a ketone body, ketonic acid, or keto acid. Other synonyms for ketone include oxoketone, carbonyl, and ketonic hydrocarbon. Additionally, there are specific ketones like acetone, which is also known as propanone, and butanone, which is commonly referred to as methyl ethyl ketone (MEK). Ketones play critical roles in various biochemical processes in the body, such as energy production and metabolism. They are also used extensively as solvents and in the manufacture of chemicals, pharmaceuticals, and plastics.