Слова на букву obtr-phyl (6389) New Collegiate Dictionary
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Слова на букву obtr-phyl (6389)

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noun Usage: often capitalized O&E, often attributive Etymology: short for opposite editorial Date: 1970 a page of special features usually opposite the editorial page of a ...
noun (plural -ties) Etymology: Middle French opacité shadiness, from Latin opacitat-, opacitas, from opacus shaded, dark Date: 1560 1. a. obscurity of sense ; ...
noun Etymology: perhaps from Ibo úbà Date: 1750 a large elliptical laterally compressed marine bony fish (Lampris guttatus of the family Lampridae) with brilliant colors
noun Etymology: Latin opalus, from Greek opallios, ultimately from Sanskrit upala stone, jewel Date: circa 1586 a usually amorphous mineral that is a hydrated silica softer ...
noun see opalescent
adjective Date: circa 1813 reflecting an iridescent light • opalescence noun • opalescently adverb
adverb see opalescent
adjective Date: 1784 resembling opal
adjective Etymology: Latin opacus Date: 1641 1. exhibiting opacity ; blocking the passage of radiant energy and especially light 2. a. hard to understand or explain ...
opaque projector
noun Date: 1951 a projector using reflected light for projecting an image of an opaque object or matter on an opaque support (as a photograph)
adverb see opaque
noun see opaque
verb (oped; oping) Date: 15th century archaic open
abbreviation Organization of Petroleum Exporting Countries
geographical name city E Alabama population 23,498
geographical name city S central Louisiana N of Lafayette population 22,860
I. adjective (opener; openest) Etymology: Middle English, from Old English; akin to Old High German offan open, Old English ūp up Date: before 12th century 1. having no ...
open admission
noun Date: 1969 open enrollment 2
open adoption
noun Date: 1979 an adoption that involves contact between biological and adoptive parents and sometimes between biological parents and the adopted child
open air
noun Date: 15th century the space where air is unconfined; especially outdoors
open arms
noun plural Date: 1735 an eager or warm welcome
open bar
noun Date: 1973 a bar (as at a wedding reception) at which drinks are served free — compare cash bar
open chain
noun Date: 1880 an arrangement of atoms represented in a structural formula by a chain whose ends are not joined so as to form a ring
open city
noun Date: 1914 a city that is not occupied or defended by military forces and that is not allowed to be bombed under international law
open dating
noun Date: 1971 the marking of perishable food products with a clearly readable date indicating when the food was packaged or the last date on which it should be sold or used
open door
noun Date: 1526 1. a recognized right of admittance ; freedom of access; also a policy providing such freedom 2. a policy giving opportunity for commercial relations with a ...
open enrollment
noun Date: 1964 1. the voluntary enrollment of a student in a public school other than the one assigned on the basis of residence 2. enrollment on demand as a student in an ...
open house
noun Date: 15th century 1. ready and usually informal hospitality or entertainment for all comers 2. a house or apartment open for inspection especially by prospective ...
open letter
noun Date: 1878 a published letter of protest or appeal usually addressed to an individual but intended for the general public
open loop
noun Date: 1947 a control system for an operation or process in which there is no self-correcting action as there is in a closed loop
open marriage
noun Date: 1971 a marriage in which the partners agree to let each other have sexual partners outside the marriage
open mike
noun Date: 1978 an event in which amateurs may perform (as at a coffeehouse) usually without auditioning first
open season
noun Date: circa 1890 1. a period when it is legal to kill or catch game or fish protected at other times by law 2. a time during which someone or something is the object of ...
open secret
noun Date: 1828 a supposedly secret but generally known matter
open sentence
noun Date: 1937 a statement (as in mathematics) that contains at least one blank or unknown and that becomes true or false when the blank is filled or a quantity is ...
open sesame
noun Etymology: from open sesame, the magical command used by Ali Baba to open the door of the robbers' den in Ali Baba and the Forty Thieves Date: circa 1837 something that ...
open shop
noun Date: 1903 an establishment in which eligibility for employment and retention on the payroll are not determined by membership or nonmembership in a labor union though ...
open sight
noun Date: 1591 a firearm rear sight having an open notch
open stance
noun Date: 1948 a stance (as in golf) in which the forward foot is farther from the line of play than the back foot — compare closed stance
open syllable
noun Date: 1891 a syllable ended by a vowel or diphthong
open up
verb Date: 1582 transitive verb 1. to make available 2. to make plain or visible ; disclose 3. to open by cutting into intransitive verb 1. to spread out or come ...
adjective Date: 1830 outdoor
adjective Date: 1841 1. perfectly simple ; obvious 2. easily settled
adjective see open door
adjective Date: 1917 organized to allow for contingencies: as a. permitting additional debt to be incurred under the original indenture subject to specified conditions ...
adjective Date: 1825 not rigorously fixed: as a. adaptable to the developing needs of a situation b. permitting or designed to permit spontaneous and unguided ...
noun see open-ended
adjective Date: 1601 1. having the eyes open 2. carefully observant ; discerning
adjective see open-faced
also open-face adjective Date: 1918 served without a covering layer (as of bread or pastry)
adjective Date: 1960 of, relating to, or performed on a heart temporarily stopped and relieved of circulatory function and surgically opened for repair of defects or damage ...
adjective Date: 1881 of, relating to, involving, or produced in the open-hearth process
open-hearth process
noun Date: 1882 a process of making steel from pig iron in a furnace of the regenerative reverberatory type
adjective Date: 1979 being or relating to a clinical trial in which the treatment given to each subject is not concealed from either the experimenters or the subject — ...
adjective Date: 1828 receptive to arguments or ideas • open-mindedly adverb • open-mindedness noun
adverb see open-minded
noun see open-minded
adjective Date: 1925 pollinated by natural agencies (as wind or insects) without human intervention
adjective see openwork
noun see open II
adjective see open II
adjective Date: 1713 chiefly British worked from a surface open to the air
noun Date: 15th century one that opens : as a. plural cards of sufficient value for a player to open the betting in a poker game b. the first item, contest, or event of ...
adjective Date: 1593 generous, munificent • openhandedly adverb • openhandedness noun
adverb see openhanded
noun see openhanded
adjective Date: 1611 1. candidly straightforward ; frank 2. responsive to emotional appeal • openheartedly adverb • openheartedness noun
adverb see openhearted
noun see openhearted
noun Date: 13th century 1. a. an act or instance of making or becoming open b. an act or instance of beginning ; commencement; especially a formal and usually public ...
adverb see open I
adjective Date: 15th century 1. clamorous, vociferous 2. having the mouth wide open 3. struck with amazement or wonder • openmouthedly adverb • openmouthedness ...
adverb see openmouthed
noun see openmouthed
noun see open I
noun Usage: often attributive Date: 1598 work constructed so as to show openings through its substance ; work that is perforated or pierced • open-worked adjective
I. plural of opus II. noun Etymology: Italian, work, opera, from Latin, work, pains; akin to Latin oper-, opus — more at operate Date: 1644 1. a drama set to music and ...
opéra bouffe
noun Etymology: French, from Italian opera buffa Date: 1870 satirical comic opera
opera buffa
noun Etymology: Italian, literally, comic opera Date: 1770 an 18th century farcical comic opera with dialogue in recitative
opéra comique
noun Etymology: French, literally, comic opera Date: 1744 an opera characterized by spoken dialogue interspersed between the arias and ensemble numbers — compare grand opera
opera glass
noun Date: 1738 a small low-power binocular without prisms for use at the opera or theater — often used in plural
opera hat
noun Date: 1810 a man's collapsible top hat
opera house
noun Date: 1720 a theater devoted principally to the performance of operas; broadly theater
opera seria
noun Etymology: Italian, literally, serious opera Date: circa 1854 an 18th century opera with a heroic or legendary subject
noun see operable
adjective Date: 1646 1. fit, possible, or desirable to use ; practicable 2. likely to result in a favorable outcome upon surgical treatment • operability noun • ...
adverb see operable
noun Date: 1850 a person who frequently goes to operas • operagoing noun
noun see operagoer
noun Etymology: Latin operandum, neuter of gerundive of operari Date: 1853 something (as a quantity or data) that is operated on (as in a mathematical operation); also the ...
I. adjective Date: 15th century 1. functioning or tending to produce effects ; effective 2. of or relating to the observable or measurable 3. of, relating to, or being ...
operant conditioning
noun Date: 1941 conditioning in which the desired behavior or increasingly closer approximations to it are followed by a rewarding or reinforcing stimulus — compare ...
adverb see operant I
verb (-ated; -ating) Etymology: Latin operatus, past participle of operari to work, from oper-, opus work; akin to Old English efnan to perform, Sanskrit apas work Date: 1588 ...
adjective Date: 1749 1. of or relating to opera 2. grand, dramatic, or romantic in style or effect • operatically adverb
adverb see operatic
adjective Date: 1808 of, relating to, or used for or in operations
operating system
noun Date: 1961 software that controls the operation of a computer and directs the processing of programs (as by assigning storage space in memory and controlling input and ...
noun Etymology: Middle English operacioun, from Middle French operation, from Latin operation-, operatio, from operari Date: 14th century 1. performance of a practical work ...
adjective Date: circa 1909 1. of or relating to operation or to an operation 2. of, relating to, or based on operations 3. a. of, engaged in, or connected with ...
operational research
noun see operations research
noun Date: 1931 a view that the concepts or terms used in nonanalytic scientific statements must be definable in terms of identifiable and repeatable operations • ...
noun see operationalism
adjective see operationalism
adverb see operational
noun Date: 1935 operationalism • operationist noun
noun see operationism
operations research
noun Date: 1945 the application of scientific and especially mathematical methods to the study and analysis of problems involving complex systems — called also operational ...
I. adjective Date: 15th century 1. a. producing an appropriate effect ; efficacious b. most significant or essential 2. exerting force or influence ; operating 3. ...
adverb see operative I
noun see operative I
noun Date: 1611 1. one that operates: as a. one that operates a machine or device b. one that operates a business c. one that performs surgical operations d. one ...
operator gene
noun see operator
adjective see operator
I. adjective Date: 1830 of, relating to, or constituting an operculum II. noun Date: circa 1890 an opercular part (as a bone or scale)
also operculated adjective Date: circa 1775 having an operculum
adjective see operculate
noun (plural opercula; also -lums) Etymology: New Latin, from Latin, cover, from operire to shut, cover Date: 1681 1. a body process or part that suggests a lid: as a. a ...
noun Etymology: Italian, diminutive of opera Date: 1770 a usually romantic comic opera that includes songs and dancing • operettist noun
noun see operetta
noun Etymology: French opéron, from opérer to bring about, effect (from Latin operari) + -on 2-on Date: 1961 a group of closely linked genes that produces a single ...
adjective Etymology: Latin operosus, from oper-, opus work — more at operate Date: 1662 tedious, wearisome • operosely adverb • operoseness noun
adverb see operose
noun see operose
noun Date: circa 1601 the daughter of Polonius in Shakespeare's Hamlet
adjective Etymology: ultimately from Greek ophis Date: 1883 of, relating to, or resembling snakes • ophidian noun
noun Etymology: Hebrew Õphīr Date: 14th century a biblical land of uncertain location but reputedly rich in gold
adjective Etymology: ophite serpentine (stone), from Latin ophites, from Greek ophitēs (lithos), from ophitēs snakelike, from ophis snake; akin to Sanskrit ahi snake and ...
noun Etymology: New Latin Ophiuroidea, group name, from Ophiura, genus name, from Greek ophis + oura tail — more at ass Date: circa 1879 brittle star • ophiuroid ...
or ophthalmo- combining form Etymology: Greek, from ophthalmos eye
noun Etymology: Middle English obtalmia, from Late Latin ophthalmia, from Greek, from ophthalmos eye; akin to Greek ōps eye — more at eye Date: 14th century inflammation ...
adjective Date: circa 1741 1. of, relating to, or situated near the eye 2. supplying or draining the eye or structures in the region of the eye
combining form see ophthalm-
adjective see ophthalmology
adjective see ophthalmology
adverb see ophthalmology
noun Date: 1834 a physician who specializes in ophthalmology — compare optician, optometrist
noun Date: circa 1842 a branch of medical science dealing with the structure, functions, and diseases of the eye • ophthalmologic or ophthalmological adjective • ...
noun Etymology: International Scientific Vocabulary Date: circa 1857 an instrument for use in viewing the interior of the eye and especially the retina • ophthalmoscopic ...
adjective see ophthalmoscope
noun see ophthalmoscope
I. noun Date: 15th century 1. a. a drug (as morphine or codeine) containing or derived from opium and tending to induce sleep and alleviate pain; broadly narocotic 1a b. ...
verb (opined; opining) Etymology: Middle English, from Middle French & Latin; Middle French opiner, from Latin opinari to have an opinion Date: 15th century intransitive verb ...
noun Etymology: Middle English, from Anglo-French, from Latin opinion-, opinio, from opinari Date: 14th century 1. a. a view, judgment, or appraisal formed in the mind ...
adjective Date: 1601 unduly adhering to one's own opinion or to preconceived notions • opinionatedly adverb • opinionatedness noun
adverb see opinionated
noun see opinionated
adjective Date: 1536 1. of, relating to, or consisting of opinion ; doctrinal 2. opinionated • opinionatively adverb • opinionativeness noun
adverb see opinionative
noun see opinionative
adjective see opinion
I. adjective Date: 1967 1. possessing some properties characteristic of opiate narcotics but not derived from opium 2. of, involving, or induced by an opioid II. noun Date: ...
opioid peptide
noun see opioid II
noun (plural -branchs) Etymology: New Latin Opisthobranchia, from Greek opisthen behind (akin to Greek epi on) + branchia gills — more at epi- Date: circa 1856 any of a ...
noun Etymology: Middle English, from Latin, from Greek opion, from diminutive of opos sap Date: 14th century 1. a bitter brownish addictive narcotic drug that consists of the ...
opium poppy
noun Date: 1863 an annual Eurasian poppy (Papaver somniferum) cultivated since antiquity as the source of opium, for its edible oily seeds, or for its showy flowers
or German Oppeln geographical name city SW Poland on the Oder population 127,653
geographical name — see Porto
noun (plural opossums; also opossum) Etymology: earlier apossoun, opassom, Virginia Algonquian, from Algonquian *wa•p- white + *-aʔθemw- dog Date: 1610 1. any of a family ...
abbreviation opposite
geographical name see Opole
biographical name Edward Phillips 1866-1946 English novelist
biographical name (Julius) Robert 1904-1967 American physicist
I. noun Etymology: Latin opponent-, opponens, present participle of opponere Date: 1560 1. one that takes an opposite position (as in a debate, contest, or conflict) 2. a ...
adjective Etymology: Middle English, from Middle French opportun, from Latin opportunus, from ob- toward + portus port, harbor — more at ob-, ford Date: 15th century 1. ...
adverb see opportune
noun see opportune
noun Date: 1870 the art, policy, or practice of taking advantage of opportunities or circumstances often with little regard for principles or consequences
noun Date: 1879 one that is opportunistic or that practices opportunism • opportunist adjective
adjective Date: 1892 taking advantage of opportunities as they arise: as a. exploiting opportunities with little regard to principle or consequences b. feeding on ...
adverb see opportunistic
noun (plural -ties) Date: 14th century 1. a favorable juncture of circumstances 2. a good chance for advancement or progress
opportunity cost
noun Date: 1911 the added cost of using resources (as for production or speculative investment) that is the difference between the actual value resulting from such use and ...
noun see opposable
adjective Date: circa 1812 1. capable of being opposed or resisted 2. capable of being placed against one or more of the remaining digits of a hand or foot • ...
transitive verb (opposed; opposing) Etymology: French opposer, from Latin opponere (perfect indicative opposui), from ob- against + ponere to place — more at ob-, position ...
adjective Date: 15th century set or placed in opposition ; contrary
adjective Date: 1605 archaic irresistible
noun see oppose
I. adjective Etymology: Middle English, from Middle French, from Latin oppositus, past participle of opponere Date: 14th century 1. a. set over against something that is ...
opposite number
noun Date: 1906 a member of a system or class who holds relatively the same position as a particular member in a corresponding system or class ; counterpart
adverb see opposite I
noun see opposite I
noun Date: 14th century 1. a configuration in which one celestial body is opposite another (as the sun) in the sky or in which the elongation is near or equal to 180 degrees ...
adjective see opposition
noun Date: 1773 a member of an opposition • oppositionist adjective
transitive verb Etymology: Middle English, from Anglo-French oppresser, from Latin oppressus, past participle of opprimere, from ob- against + premere to press — more at ob-, ...
noun Date: 14th century 1. a. unjust or cruel exercise of authority or power b. something that oppresses especially in being an unjust or excessive exercise of power ...
adjective Date: circa 1677 1. unreasonably burdensome or severe 2. tyrannical 3. overwhelming or depressing to the spirit or senses Synonyms: see onerous • ...
adverb see oppressive
noun see oppressive
noun see oppress
adjective Date: 14th century 1. expressive of opprobrium ; scurrilous 2. deserving of opprobrium ; infamous • opprobriously adverb • opprobriousness noun
adverb see opprobrious
noun see opprobrious
noun Etymology: Latin, from opprobrare to reproach, from ob in the way of + probrum reproach; akin to Latin pro forward and to Latin ferre to carry, bring — more at ob-, for, ...
transitive verb Etymology: Middle English, from Latin oppugnare, from ob- against + pugnare to fight — more at ob-, pungent Date: 15th century 1. to fight against 2. to ...
noun see oppugn
noun Etymology: Latin Date: 14th century the Roman goddess of abundance and the wife of Saturn
noun Etymology: probably from rhodopsin Date: 1951 any of various colorless proteins that in combination with retinal or a related prosthetic group form a visual pigment (as ...
adjective Date: 1903 of, relating to, or involving opsonin
noun Etymology: Latin opsonare to buy provisions, cater (from Greek opsōnein) + English 1-in — more at oligopsony Date: 1903 any of various proteins (as antibodies or ...
I. intransitive verb Etymology: French opter, from Latin optare Date: 1877 to make a choice; especially to decide in favor of something II. abbreviation 1. optical; ...
opt out
intransitive verb Date: 1951 to choose not to participate in something — often used with of
adjective Date: 15th century 1. a. of, relating to, or constituting a verbal mood that is expressive of wish or desire b. of, relating to, or constituting a sentence ...
adverb see optative
I. adjective Etymology: Middle English, from Medieval Latin opticus, from Greek optikos, from opsesthai to be going to see; akin to Greek opsis appearance, ōps eye — more at ...
optic axis
noun Date: 1664 a line in a doubly refracting medium that is parallel to the direction in which all components of plane-polarized light travel with the same speed
optic chiasm
noun see optic chiasma
optic chiasma
noun Date: 1872 the X-shaped partial decussation on the undersurface of the hypothalamus through which the optic nerves are continuous with the brain — called also optic ...
optic cup
noun Date: circa 1885 the optic vesicle after invaginating to form a 2-layered cup from which the retina and pigmented layer of the eye will develop — called also eyecup
optic disk
noun Date: 1871 blind spot 1a
optic lobe
noun Date: 1844 either of two prominences of the midbrain concerned with vision
optic nerve
noun Date: 1615 either of the second pair of cranial nerves that pass from the retina to the optic chiasma and conduct visual stimuli to the brain — see eye illustration
optic vesicle
noun Date: circa 1885 an evagination of each lateral wall of the embryonic vertebrate forebrain from which the nervous structures of the eye develop
adjective Date: 1570 1. of or relating to the science of optics 2. a. of or relating to vision ; visual b. visible 1 c. of, relating to, or being objects that ...
optical activity
noun Date: 1877 ability of a chemical substance to rotate the plane of vibration of polarized light to the right or left
optical art
noun Date: 1964 nonobjective art characterized by the use of straight or curved lines or geometric patterns often for an illusory effect (as of motion)
optical bench
noun Date: 1883 an apparatus that is fitted for the convenient location and adjustment of light sources and optical devices and that is used for the observation and ...
optical disk
noun Date: 1977 a disk with a plastic coating on which information (as music, visual images, or computer data) is recorded digitally (as in the form of tiny pits) and which is ...
optical fiber
noun Date: 1962 a single fiber-optic strand
optical glass
noun Date: 1840 flint or crown glass of well-defined characteristics used especially for making lenses
optical illusion
noun Date: 1794 illusion 2a(1)
optical rotation
noun Date: 1895 the angle through which the plane of vibration of polarized light that traverses an optically active substance is rotated
adverb see optical
optically active
adjective Date: 1875 capable of rotating the plane of vibration of polarized light to the right or left — used of compounds, molecules, or atoms
noun Date: 1737 1. a maker of or dealer in optical items and instruments 2. a person who reads prescriptions for visual correction, orders lenses, and dispenses eyeglasses ...
noun plural but singular in construction Date: 1579 a science that deals with the genesis and propagation of light, the changes that it undergoes and produces, and other ...
adjective Date: 1890 most desirable or satisfactory ; optimum • optimality noun • optimally adverb
noun see optimal
adverb see optimal
British variant of optimization
British variant of optimize
noun Etymology: French optimisme, from Latin optimum, noun, best, from neuter of optimus best; akin to Latin ops power — more at opulent Date: 1759 1. a doctrine that this ...
noun Etymology: Optimist (Club) Date: 1911 a member of a major international service club
noun see optimism
adjective see optimism
adverb see optimism
noun Date: 1857 an act, process, or methodology of making something (as a design, system, or decision) as fully perfect, functional, or effective as possible; specifically ...
transitive verb (-mized; -mizing) Date: 1857 to make as perfect, effective, or functional as possible • optimizer noun
noun see optimize
noun (plural optima; also -mums) Etymology: Latin Date: 1879 1. the amount or degree of something that is most favorable to some end; especially the most favorable condition ...
I. noun Etymology: French, from Latin option-, optio free choice; akin to Latin optare to choose Date: 1593 1. an act of choosing 2. a. the power or right to choose ; ...
option play
noun see option I
adjective Date: 1765 involving an option ; not compulsory • optionality noun • optionally adverb
noun see optional
adverb see optional
combining form Etymology: Greek optos, verbal of opsesthai — more at optic 1. vision 2. optic and
adjective see optoelectronics
noun plural but singular in construction Date: 1959 a branch of electronics that deals with electronic devices for emitting, modulating, transmitting, and sensing light • ...
adjective Date: 1925 of, relating to, or involving movements of the eyes
adjective see optometry
noun Date: 1903 a specialist licensed to practice optometry — compare ophthalmologist, optician
noun Etymology: International Scientific Vocabulary Date: 1886 the health-care profession concerned especially with examining the eye for defects and faults of refraction, ...
noun Date: circa 1510 1. wealth, affluence 2. abundance, profusion
adjective Etymology: Latin opulentus, from ops power, help; akin to Latin opus work Date: 1523 exhibiting or characterized by opulence: as a. having a large estate or ...
adverb see opulent
noun Etymology: Latin, a plant, from feminine of opuntius of Opus, from Opunt-, Opus Opus, ancient city in Greece Date: 1601 any of a large genus (Opuntia) of American cacti ...
noun (plural opera; also opuses) Etymology: Latin oper-, opus — more at operate Date: 1809 work; especially a musical composition or set of compositions usually numbered ...
noun Etymology: French, from Latin opusculum, diminutive of opus Date: circa 1656 a small or petty work ; opusculum
noun (plural opuscula) Etymology: Latin Date: 1654 a minor work (as of literature) — usually used in plural
Oquirrh Mountains
geographical name mountain range N central Utah S of Great Salt Lake; highest point about 11,000 feet (3353 meters)
I. noun Etymology: 1or Date: circa 1956 a logical operator that requires either of two inputs to be present or conditions to be met for an output to be made or a statement to ...
I. conjunction Etymology: Middle English, alteration of other, alteration of Old English oththe; akin to Old High German eddo or Date: 13th century 1. — used as a function ...
plural of os

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