Oxalacetate is a term used in biochemistry to refer to a four-carbon organic acid that is involved in cellular metabolism. It plays a crucial role in the Krebs cycle, a series of chemical reactions that occur in the mitochondria and produce energy for the cell. While oxalacetate is the commonly used term for this acid, it has several synonyms, including oxaloacetate, acidum oxaloaceticum, and 2-oxosuccinic acid. These synonyms are used interchangeably in scientific literature and textbooks. Researchers and students in the field of biochemistry should be familiar with these synonyms to better understand and communicate about this important metabolite.