An ox (plural oxen), also known as a bullock in Australia and India, is a bovine trained as a draft animal.
Oxycodone is a semisynthetic opioid synthesized from thebaine, an opioid alkaloid found in the Persian poppy, and one of the many alkaloids found in the opium poppy.
Oxygen is a chemical element with symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table and is a highly reactive nonmetal and oxidizing agent that readily forms oxides with most elements as well as other compounds.
The Oxford English Dictionary (OED) is a descriptive dictionary of the English language, published by the Oxford University Press.
Oxford University Press (OUP) is the largest university press in the world, and the second oldest after Cambridge University Press.
Oxford (/ˈɒksfərd/) is a city in the South East region of England and the county town of Oxfordshire. With an estimated 2015 population of 168,270, it is the 52nd largest city in the United Kingdom, and one of the fastest growing and most ethnically diverse.
Oxytocin (Oxt; /ˌɒksᵻˈtoʊsɪn/, /ˌɒksi-/) is a peptide hormone and neuropeptide. Oxytocin is also used as a medication to facilitate childbirth.
Oxy-fuel welding (commonly called oxyacetylene welding, oxy welding, or gas welding in the U.S.) and oxy-fuel cutting are processes that use fuel gases and oxygen to weld and cut metals, respectively.
Oxfam is an international confederation of charitable organizations focused on the alleviation of global poverty.
Oxidative phosphorylation (or OXPHOS in short) is the metabolic pathway in which cells use enzymes to oxidize nutrients, thereby releasing energy which is used to reform ATP.