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 decathl ...

, a given name and surname * ''Orn'', the second book in Piers Anthony's trilogy

Of Man and Manta Of Man and Manta is a trilogy of science fiction novels written by Piers Anthony. It consists of the three books: ''Omnivore'' (1968), ''Orn'' (1970), and ' (1975). ''Omnivore'' has as its frame the investigation of the deaths of eighteen travel ...

Offshoring Research Network The Offshoring Research Network is an international network of researchers and practitioners studying organizations in their transition to globalizing their business functions, processes and administrative services. The ORN conducts annual survey ...

, 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 b ...

, a type of cell in the nasal mucosa that transduces the presence of odorant molecules into a neural signal *

Olympic route network An Olympic route network (ORN) and Paralympic route network (PRN) is a network of dedicated roads linking venues and other key sites in a host city during Olympic and Paralympic games to ensure that athletes and officials get to events on time. R ...

, a network of dedicated roads linking venues and other key sites in the host city during Olympic games *

Oran Es Sénia Airport Ahmed Ben Bella Airport ( ar, مطار أحمد بن بلة), formally Es-Sénia Airport is an airport located 4.7 nm (8.7 km) south of Oran (near Es Sénia), in Algeria. History During World War II, La Sénia Airport was first used by t ...

(IATA code), an international airport in Es Sénia, Algeria *

Ornithine Ornithine is a non-proteinogenic amino acid that plays a role in the urea cycle. Ornithine is abnormally accumulated in the body in ornithine transcarbamylase deficiency. The radical is ornithyl. Role in urea cycle L-Ornithine is one of the produ ...

, an amino acid that plays a role in the urea cycle *

Osteoradionecrosis Osteoradionecrosis (ORN) is a serious complication of radiation therapy in cancer treatment where radiated bone becomes necrotic and exposed. ORN occurs most commonly in the mouth during the treatment of head and neck cancer, and can arise over 5 y ...

, a complication of radiation therapy where a section of bone dies

See also