Orn or ORN may refer to: *

Orn (name) Orn and Örn is an Icelandic name. It may refer to: People with the given name *Örn Arnarson (born 1981), Icelandic swimmer *Örn Árnason (born 1959), Icelandic actor, comedian and screenwriter *Örn Clausen (1928–2008), Icelandic decathlet ...

, a given name and surname * ''Orn'', the second book in Piers Anthony's trilogy Of Man and Manta * Offshoring Research Network, an international network researching the offshoring of business processes and services *

Olfactory receptor neuron An olfactory receptor neuron (ORN), also called an olfactory sensory neuron (OSN), is a sensory neuron within the olfactory system. Structure Humans have between 10 and 20 million olfactory receptor neurons (ORNs). In vertebrates, ORNs are Bi ...

, a type of cell in the nasal mucosa that transduces the presence of odorant molecules into a neural signal * Olympic route network, a network of dedicated roads linking venues and other key sites in the host city during Olympic games * Oran Es Sénia Airport (IATA code), an international airport in Es Sénia, Algeria *

Ornithine Ornithine is a non-proteinogenic α-amino acid that plays a role in the urea cycle. It is not incorporated into proteins during translation. Ornithine is abnormally accumulated in the body in ornithine transcarbamylase deficiency, a disorder of th ...

, an amino acid that plays a role in the urea cycle * Osteoradionecrosis, a complication of radiation therapy where a section of bone dies

See also