Glossary · Nouns · O
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TermTypeDefinitionClassificationsUpdated
Orchard Apple TreenounMWEnative Eurasian tree widely cultivated in many varieties for its firm rounded edible fruitsverified
Orchestranouna musical organization consisting of a group of instrumentalists including string playersverified
Orchestra PitnounMWElowered area in front of a stage where an orchestra accompanies the performersverified
Orchestral BellsnounMWEa percussion instrument consisting of a set of graduated metal bars mounted on a frame and played with small hammersverified
Orchestrationnounthe act of arranging a piece of music for an orchestra and assigning parts to the different musical instrumentsverified
Orchidnounany of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colorsverified
Orchid CactusnounMWEany cactus of the genus Epiphyllum having flattened jointed irregularly branching stems and showy tubular flowersverified
Orchid FamilynounMWEenormous cosmopolitan family of perennial terrestrial or epiphytic plants with fleshy tubers or rootstocks and unusual flowersverified
Orchidaceous PlantnounMWEany of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colorsverified
Orchisnounany of various deciduous terrestrial orchids having fleshy tubers and flowers in erect terminal racemesverified
Orchotomynounsurgical incision into the testis to obtain material for analysis (as in cases of abnormally low sperm count)verified
Ordealnouna primitive method of determining a person's guilt or innocence by subjecting the accused person to dangerous or painful tests believed to be under divine controlverified
Order CodenounMWEthe portion of a set of operation descriptions that specifies the operation to be performedverified
Order MantophasmatodeanounMWEan order of insect identified in 2002 in a 45 million year old piece of amber from the Baltic regionverified
Ordinary AnnuitynounMWEan annuity paid in a series of more or less equal payments at the end of equally spaced periodsverified
Ordinary Life InsurancenounMWEinsurance on the life of the insured for a fixed amount at a definite premium that is paid each year in the same amount during the entire lifetime of the insuredverified
Ore DressingnounMWEcrushing and separating ore into valuable substances or waste by any of a variety of techniquesverified
Ore ProcessingnounMWEAny operation or set of operations performed on personal data, whether or not by automated meansverified
Oreganonounpungent leaves used as seasoning with meats and fowl and in stews and soups and omeletsverified
Organnounwind instrument whose sound is produced by means of pipes arranged in sets supplied with air from a bellows and controlled from a large complex musical keyboardverified
Organ TransplantnounMWEan operation moving an organ from one organism (the donor) to another (the recipient)verified
Organic Brain SyndromenounMWEmental abnormality resulting from disturbance of the structure or function of the brainverified
Organic ChemistrynounMWEthe chemistry of compounds containing carbon (originally defined as the chemistry of substances produced by living organisms but now extended to substances synthesized artificially)verified
Organic DisordernounMWEdisorder caused by a detectable physiological or structural change in an organverified
Organic EvolutionnounMWE(biology) the sequence of events involved in the evolutionary development of a species or taxonomic group of organismsverified
Organic Light-Emitting DiodenounMWEa self-luminous diode (it glows when an electrical field is applied to the electrodes) that does not require backlighting or diffusersverified
Organic StructurenounMWEthe entire structure of an organism (an animal, plant, or human being)verified
Organicismnountheory that the total organization of an organism rather than the functioning of individual organs is the determinant of life processesverified
Organisationnounthe persons, committees or departments that make up a body for the purpose of administering somethingverified
Organisernouna lightweight consumer electronic device that looks like a hand-held computer but instead performs specific tasksverified
Organismnouna living thing that has (or can develop) the ability to act or function independentlyverified
Organizationnounthe persons, committees or departments that make up a body for the purpose of administering somethingverified
Organization ChartnounMWEa chart showing the lines of responsibility between departments of a large organizationverified