An enzymatic process in cell metabolism that synthesizes ATP from ADP WordNet 3.0 & Open English WordNet

Oxidative phosphorylation or electron transport-linked phosphorylation or terminal oxidation is the metabolic pathway in which cells use enzymes to oxidize nutrients, thereby releasing chemical energy in order to produce adenosine triphosphate. Wikipedia

Phosphorylation of ADP to ATP that accompanies the oxidation of a metabolite through the operation of the respiratory chain Wikidata

Aerobic phosphorylation of cellular nutrients to release energy and reform ATP. Wiktionary