Glossary · Nouns · O
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TermTypeDefinitionClassificationsUpdated
Olfactory BrainnounMWEa center in the cerebral hemispheres that governs the sense of smell in lower animalsverified
Olfactory BulbnounMWEone of two enlargements at the terminus of the olfactory nerve at the base of the brain just above the nasal cavitiesverified
Olfactory NervenounMWEa collective term for numerous olfactory filaments in the nasal mucosaverified
Olfactory PerceptionnounMWEthe sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous formverified
Olfactory SensationnounMWEthe sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous formverified
Oligochaetenounhermaphroditic terrestrial and aquatic annelids having bristles borne singly along the length of the bodyverified
Oligochaete WormnounMWEhermaphroditic terrestrial and aquatic annelids having bristles borne singly along the length of the bodyverified
Oligodendrianountissue consisting of glial cells with sheetlike processes that form the myelin sheath of nerve fibersverified
Oligodendroglianountissue consisting of glial cells with sheetlike processes that form the myelin sheath of nerve fibersverified
Oligopolynoun(economics) a market in which control over the supply of a commodity is in the hands of a small number of producers and each one can influence prices and affect competitorsverified
Oligosaccharidenounany of the carbohydrates that yield only a few monosaccharide molecules on complete hydrolysisverified
Olive RidleynounMWEolive-colored sea turtle of tropical Pacific and Indian and the southern Atlantic oceansverified
Olivenitenounrare green to black mineral consisting of hydrated copper arsenate that is found in copper depositsverified
Ologynounan informal word (abstracted from words with this ending) for some unidentified branch of knowledgeverified
Olympic SalamandernounMWEsmall large-eyed semiaquatic salamander of the United States Northwestverified
Ombunounfast-growing herbaceous evergreen tree of South America having a broad trunk with high water content and dark green oval leavesverified
Ombudsmannouna government appointee who investigates complaints by private persons against the governmentverified
Omega-3nouna polyunsaturated fatty acid whose carbon chain has its first double valence bond three carbons from the beginningverified
Omega-3 Fatty AcidnounMWEa polyunsaturated fatty acid whose carbon chain has its first double valence bond three carbons from the beginningverified
Omega-6nouna polyunsaturated fatty acid whose carbon chain has its first double valence bond six carbons from the beginningverified
Omega-6 Fatty AcidnounMWEa polyunsaturated fatty acid whose carbon chain has its first double valence bond six carbons from the beginningverified
Ommatidiumnounany of the numerous small cone-shaped eyes that make up the compound eyes of some arthropodsverified
Omnidirectional AntennanounMWEan antenna that sends or receives signals equally in all directionsverified
Omnidirectional Radio RangenounMWEa navigational system consisting of a network of radio beacons that provide aircraft with information about exact position and bearingverified
Omnidirectional RangenounMWEa navigational system consisting of a network of radio beacons that provide aircraft with information about exact position and bearingverified
Omnirangenouna navigational system consisting of a network of radio beacons that provide aircraft with information about exact position and bearingverified
Omphalocelenounprotrusion of the intestine and omentum through a hernia in the abdominal wall near the navelverified
Omphaloskepsisnounliterally, the contemplation of one's navel, which is an idiom usually meaning complacent self-absorptionverified
On-CardnounRefers to data that is stored within the PIV card or computation that is done by the ICC of the PIV card.DataRegulatedCUI
On-us checksnounMWEChecks that are deposited into the same institution on which they are drawn.DataRegulatedPII
Onanismnouna method of birth control in which coitus is initiated but the penis is deliberately withdrawn before ejaculationverified
Onchocerciasisnouninfestation with slender threadlike roundworms (filaria) deposited under the skin by the bite of black fleasverified
Oncidiumnounany orchid of the genus Oncidium: characterized by slender branching sprays of small yellow and brown flowersverified
One Million Million MillionnounMWEthe number that is represented as a one followed by 18 zerosverified
One of the BoysnounMWEa person who has been socially accepted into a group of other people, typically menverified