Malonyl n. : A hydrocarbon radical, CH2.(CO)2, from malonic acid.

Example:
What is the structure of ethyl Malonyl CoA?

Taxonomy
Malonyl-CoA, fatty acids, free encyclopedia, fatty acid biosynthesis, molecule, MCAT, Malonyl-CoA decarboxylase, Malonyl-CoA decarboxylase deficiency, Malonyl, enzyme, polyketide biosynthesis, chain elongation, fatty acid synthesis, degradation, acyl carrier protein, search, Identifiers, CoA.

Defination from the web:
Malonyl-CoA is formed by carboxylating acetyl-CoA using the enzyme acetyl-CoA carboxylase. ... Malonyl CoA inhibits fatty acids from associating with carnitine, thereby preventing them from entering the mitochondria where fatty acid oxidation and degradation occur. ...