Copy of `Princeton University - WordNet - a lexical database for the English language`

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Princeton University - WordNet - a lexical database for the English language Category: General Date & country: 27/01/2008, USA Words: 85192

opera
opera house noun a building where musical dramas are performed

opera cloak
opera hood noun a large cloak worn over evening clothes

opera company
noun a company that produces operas

opera star
operatic star noun singer of lead role in an opera

operable
practicable adjective usable for a specific purpose; `an operable plan`; `a practicable solution`

operagoer
noun a patron of the opera

operand
noun a quantity upon which a mathematical operation is performed

operant
adjective having influence or producing an effect; `many emotional determinants at work`; `an operant conscience`

operant conditioning
noun conditioning in which an operant response is brought under stimulus control by virtue of presenting reinforcement contingent upon the occurrence of the operant response

operatic
adjective of or relating to or characteristic of opera

operating
adjective involved in a kind of operation; `the operating conditions of the oxidation pond`

operating budget
noun a budget for current expenses as distinct from financial transactions or permanent improvements

operating capability
performance capability noun the capability of a technological system to perform as intended

operating capital
noun capital available for the operations of a firm (e.g. manufacturing or transportation) as distinct from financial transactions and long-term improvements

operating expense
operating cost noun the expense of maintaining property (e.g., paying property taxes and utilities and insurance); it does not include depreciation or the cost of financing or income taxes

operating microscope
noun binocular microscope used in surgery to provide a clear view of small and inaccessible parts of the body (as in microsurgery)

operating procedure
noun a procedure for operating something or for dealing with a given situation

operating room
OR noun a room in a hospital equipped for the performance of surgical operations; `great care is taken to keep the operating rooms aseptic`

operating system
OS noun (computer science) software that controls the execution of computer programs and may provide various services

operating table
noun table on which the patient lies during a surgical operation

operation
surgery 1 surgical operation noun a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body; `they will schedule the operation as soon as an operating room is available`; `he died while undergoing surgery`

operation
noun activity by a military or naval force (as a maneuver or campaign); `it was a joint operation of the navy and air force`

operation code
order code noun the portion of a set of operation descriptions that specifies the operation to be performed; the set of operations in a computer

Operation Desert Storm
noun the United States and its allies defeated Iraq in a ground war that lasted 100 hours (1991)

operational
adjective pertaining to a process or series of actions for achieving a result; `operational difficulties`; `they assumed their operational positions`

operational cell
noun a terrorist cell that performs clandestine activities

operational damage
operational casualty noun loss of military equipment in field operations

operationalism
noun (philosophy) the doctrine that the meaning of a proposition consists of the operations involved in proving or applying it

operationalist
adjective of or relating to or espousing operationalism; `operationalist doctrine`

operationally
adverb in respect to operation; `reported the machine operationally satisfactory`; `a well-trained staff that is operationally adequate`

operations
trading operations noun financial transactions at a brokerage; having to do with the execution of trades and keeping customer records

operations research
noun research designed to determine most efficient way to do something

operative
key adjective effective; producing a desired effect; `the operative word`

operative field
noun the area that is open during surgery

operatively
adverb by means of an operative

operator
manipulator noun an agent that operates some apparatus or machine; `the operator of the switchboard`

operator gene
noun a gene that activates the production of messenger RNA by adjacent structural genes

operculate
operculated adjective having an operculum

operculum
noun a hard flap serving as a cover for (a) the gill slits in fishes or (b) the opening of the shell in certain gastropods when the body is retracted

operetta
light opera noun a short amusing opera

operon
noun a segment of DNA containing adjacent genes including structural genes and an operator gene and a regulatory gene

Opheodrys
genus Opheodrys noun North American green snakes

Ophidiidae
family Ophidiidae noun eellike marine fishes

ophidism
noun poisoning by snake venom

Ophiodon
genus Ophiodon noun a genus of Ophiodontidae

Ophiodontidae
family Ophiodontidae noun fishes closely related to greenlings

Ophioglossaceae
family Ophioglossaceae noun a family of succulent ferns of order Ophioglossales; cosmopolitan in distribution

Ophioglossales
order Ophioglossales noun coextensive with the family Ophioglossaceae

Ophioglossum
genus Ophioglossum noun the type genus of the fern family Ophioglossaceae

Ophioglossum pendulum
noun epiphytic fern with straplike usually twisted fronds of tropical Asia and Polynesia and America

ophiolatry
serpent-worship noun the worship of snakes

Ophiophagus
genus Ophiophagus noun king cobra

Ophisaurus
genus Ophisaurus noun glass lizards

Ophiuchus
noun a large constellation in the equatorial region between Hercules and Scorpius

Ophiurida
subclass Ophiurida noun brittle stars

Ophiuroidea
class Ophiuroidea noun brittle stars and basket stars

ophryon
noun the craniometric point in the midline of the forehead immediately above the orbits

Ophrys
genus Ophrys noun a hardy genus of terrestrial orchids of Europe and northern Africa and western Asia

Ophrys insectifera
Ophrys muscifera noun European orchid whose flowers resemble flies

ophthalmectomy
noun surgical removal of an eye

ophthalmia
ophthalmitis noun severe conjunctivitis

ophthalmia neonatorum
noun ophthalmia in newborns; contracted while passing through the birth canal; usually prevented with silver nitrate drops

ophthalmic
adjective of or relating to ophthalmology; `ophthalmic surgery`

ophthalmic artery
arteria ophthalmica noun a branch of the internal carotid artery that supplies the eye and neighboring structures

ophthalmic vein
vena ophthalmica noun either of two veins that serve the eye; empties into the cavernous sinus

ophthalmologist
eye doctor noun a medical doctor specializing in the treatment of diseases of the eye

ophthalmology
noun the branch of medicine concerned with the eye and its diseases

ophthalmoplegia
noun paralysis of the motor nerves of the eye

ophthalmoscope
noun medical instrument for examining the retina of the eye

ophthalmoscopy
noun examination of the interior of an eye using an ophthalmoscope

opiate
noun a narcotic drug that contains opium or an opium derivative

opine
imagine 1 reckon 2 guess verb expect, believe, or suppose; `I imagine she earned a lot of money with her new novel`; `I thought to find her in a bad state`; `he didn`t think to find her in the kitchen`; `I guess she is angry at me for standing her up`

opinion
sentiment noun a personal belief or judgment that is not founded on proof or certainty; `my opinion differs from yours`; `what are your thoughts on Haiti?`

opinion
noun a message expressing a belief about something; the expression of a belief that is held with confidence but not substantiated by positive knowledge or proof; `his opinions appeared frequently on the editorial page`

opinionated
opinionative adjective obstinate in your opinions

Opisthobranchia
subclass Opisthobranchia noun gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs; sea butterflies; sea hares

Opisthocomidae
family Opisthocomidae noun comprising the hoatzins

Opisthocomus
genus Opisthocomus noun type genus of the Opisthocomidae: hoatzins

Opisthognathidae
family Opisthognathidae noun jawfishes

opisthognathous
adjective having receding jaws

opisthorchiasis
noun infestation with flukes obtained from eating raw fish; common in eastern Asia

opisthotonos
noun severe spasm in which the back arches and the head bends back and heels flex toward the back

opium
noun an addictive narcotic extracted from seed capsules of the opium poppy

opium addict
opium taker noun someone addicted to opium

opium den
noun a building where opium is sold and used

opium poppy
Papaver somniferum noun southwestern Asian herb with greyish leaves and white or reddish flowers; source of opium

opopanax
noun an odorous gum resin formerly used in medicines

opossum rat
noun terrestrial marsupials of southern South America that resemble shrews

opossum shrimp
noun shrimp-like crustaceans whose females carry eggs and young in a pouch between the legs

Oppenheimer
Robert Oppenheimer noun United States physicist who directed the project at Los Alamos that developed the first atomic bomb (1904-1967)

opponent
opposing adjective characterized by active hostility; `opponent (or opposing) armies`

opponent
noun a contestant that you are matched against

opportune
adjective suitable or at a time that is suitable or advantageous especially for a particular purpose; `an opportune place to make camp`; `an opportune arrival`

opportunely
adverb at an opportune time; `he arrived rather opportunely just when we needed a new butler`

opportuneness
patness noun timely convenience

opportunism
self-interest 1 self-seeking noun taking advantage of opportunities without regard for the consequences for others

opportunist
opportunistic adjective taking immediate advantage, often unethically, of any circumstance of possible benefit

opportunistic infection
noun any infection caused by a microorganism that does not normally cause disease in humans; occurs in persons with abnormally functioning immune systems (as AIDS patients or transplant patients receiving immunosuppressive drugs)

opportunity
chance noun a possibility due to a favorable combination of circumstances; `the holiday gave us the opportunity to visit Washington`; `now is your chance`

opportunity cost
noun cost in terms of foregone alternatives