| millimetre | (noun) a metric unit of length equal to one thousandth of a meter | Synonyms: millimeter, mm |
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| minstrel | (noun) a singer of folk songs | Synonyms: folk singer, jongleur, poet-singer, troubadour |
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| (noun) a performer in a minstrel show | - |
| minstrelsy | (noun) the art of a minstrel | - |
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| (noun) ballads sung by minstrels | - |
| (noun) a troupe of minstrels | - |
| mistreatment | (noun) the practice of treating (someone or something) badly | - |
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| mistress | (noun) a woman master who directs the work of others | - |
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| (noun) an adulterous woman; a woman who has an ongoing extramarital sexual relationship with a man | Synonyms: fancy woman, kept woman |
| (noun) a woman schoolteacher (especially one regarded as strict) | Synonyms: schoolma'am, schoolmarm, schoolmistress |
| mitre | (noun) a liturgical headdress worn by bishops on formal occasions | Synonyms: miter |
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| (noun) the surface of a beveled end of a piece where a miter joint is made | Synonyms: miter |
| (noun) joint that forms a corner; usually both sides are bevelled at a 45-degree angle to form a 90-degree corner | Synonyms: miter, miter joint, mitre joint |
| mitrewort | (noun) any of various rhizomatous perennial herbs of the genus Mitella having a capsule resembling a bishop's miter | Synonyms: bishop's cap, miterwort |
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| monotreme | (noun) the most primitive mammals comprising the only extant members of the subclass Prototheria | Synonyms: egg-laying mammal |
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| myriametre | (noun) a metric unit of length equal to 10,000 meters | Synonyms: mym, myriameter |
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| naltrexone | (noun) an oral antagonist against the action of opiates | - |
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| nanometre | (noun) a metric unit of length equal to one billionth of a meter | Synonyms: micromillimeter, micromillimetre, millimicron, nanometer, nm |
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| negotiatress | (noun) a woman negotiator | Synonyms: negotiatrix |
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| nitre | (noun) (KNO3) used especially as a fertilizer and explosive | Synonyms: niter, potassium nitrate, saltpeter, saltpetre |
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| norgestrel | (noun) synthetic progestin used in oral contraceptives | - |
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| obstreperousness | (noun) noisy defiance | - |
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| ommastrephes | (noun) extremely active cylindrical squid with short strong arms and large rhombic terminal fins | - |
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| outreach | (noun) the act of reaching out | - |
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| pesantren | (noun) a Muslim school in Indonesia operated by religious leaders | Synonyms: pesantran |
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| petrel | (noun) relatively small long-winged tube-nosed bird that flies far from land | - |
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| philtre | (noun) a drink credited with magical power; can make the one who takes it love the one who gave it | Synonyms: love-philter, love-philtre, love-potion, philter |
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| piastre | (noun) a fractional monetary unit in Egypt and Lebanon and Sudan and Syria | Synonyms: piaster |
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| (noun) 100 kurus equal 1 lira in Turkey | Synonyms: kurus, piaster |
| picometre | (noun) a metric unit of length equal to one trillionth of a meter | Synonyms: micromicron, picometer |
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| pipistrel | (noun) small European brown bat | Synonyms: pipistrelle, Pipistrellus pipistrellus |
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| pipistrelle | (noun) small European brown bat | Synonyms: pipistrel, Pipistrellus pipistrellus |
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| pointrel | (noun) a tool used by an engraver | Synonyms: graver, graving tool, pointel |
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| postmistress | (noun) a woman postmaster | - |
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| proprietress | (noun) a woman proprietor | - |
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| putrefaction | (noun) moral perversion; impairment of virtue and moral principles | Synonyms: corruption, degeneracy, depravation, depravity |
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| (noun) (biology) the process of decay caused by bacterial or fungal action | Synonyms: breakdown, decomposition, rot, rotting |
| (noun) a state of decay usually accompanied by an offensive odor | Synonyms: rot |
| putrescence | (noun) the quality of rotting and becoming putrid | Synonyms: rottenness |
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| (noun) in a state of progressive putrefaction | Synonyms: corruption, putridness, rottenness |
| putrescine | (noun) a colorless crystalline ptomaine with a foul odor that is produced in decaying animal matter | - |
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| retread | (noun) a used automobile tire that has been remolded to give it new treads | Synonyms: recap |
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| retreat | (noun) (military) withdrawal of troops to a more favorable position to escape the enemy's superior forces or after a defeat | - |
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| (noun) withdrawal for prayer and study and meditation | Synonyms: retirement |
| (noun) the act of withdrawing or going backward (especially to escape something hazardous or unpleasant) | - |
| (noun) an area where you can be alone | Synonyms: hideaway |
| (noun) (military) a bugle call signaling the lowering of the flag at sunset | - |
| (noun) (military) a signal to begin a withdrawal from a dangerous position | - |
| (noun) a place of privacy; a place affording peace and quiet | - |
| retreatant | (noun) a participant in a religious retreat | - |
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| retreated | (noun) people who have retreated | - |
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| retrenchment | (noun) the reduction of expenditures in order to become financially stable | Synonyms: curtailment, downsizing |
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| (noun) entrenchment consisting of an additional interior fortification to prolong the defense | - |
| rooftree | (noun) a beam laid along the edge where two sloping sides of a roof meet at the top; provides an attachment for the upper ends of rafters | Synonyms: ridge, ridgepole |
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| saltpetre | (noun) (KNO3) used especially as a fertilizer and explosive | Synonyms: niter, nitre, potassium nitrate, saltpeter |
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| sceptre | (noun) a ceremonial or emblematic staff | Synonyms: scepter, verge, wand |
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| (noun) the imperial authority symbolized by a scepter | Synonyms: scepter |
| schoolmistress | (noun) a woman schoolteacher (especially one regarded as strict) | Synonyms: mistress, schoolma'am, schoolmarm |
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| sculptress | (noun) a woman sculptor | - |
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| seamstress | (noun) a woman who makes or mends dresses | Synonyms: modiste, needlewoman, sempstress |
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| seductress | (noun) a woman who seduces | - |
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| sempstress | (noun) a woman who makes or mends dresses | Synonyms: modiste, needlewoman, seamstress |
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| shoetree | (noun) a wooden or metal device that is inserted into a shoe to preserve its shape when it is not being worn | - |
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| sightreader | (noun) a performer who reads without preparation or prior acquaintance (as in music) | - |
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| slipstream | (noun) the flow of air that is driven backwards by an aircraft propeller | Synonyms: airstream, backwash, race, wash |
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| songstress | (noun) a woman songster (especially of popular songs) | - |
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| spectre | (noun) a mental representation of some haunting experience | Synonyms: ghost, shade, specter, spook, wraith |
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| (noun) a ghostly appearing figure | Synonyms: apparition, fantasm, phantasm, phantasma, phantom, specter |
| streak | (noun) a narrow marking of a different color or texture from the background | Synonyms: bar, stripe |
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| (noun) a distinctive characteristic | - |
| (noun) a sudden flash (as of lightning) | - |
| (noun) an unbroken series of events | Synonyms: run |
| streaker | (noun) someone who takes off all their clothes and runs naked through a public place | - |
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| stream | (noun) the act of flowing or streaming; continuous progression | Synonyms: flow |
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| (noun) a steady flow of a fluid (usually from natural causes) | Synonyms: current |
| (noun) dominant course (suggestive of running water) of successive events or ideas | Synonyms: current, flow |
| (noun) a natural body of running water flowing on or under the earth | Synonyms: watercourse |
| (noun) something that resembles a flowing stream in moving continuously | Synonyms: flow |
| streambed | (noun) a channel occupied (or formerly occupied) by a stream | Synonyms: creek bed |
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| streamer | (noun) long strip of cloth or paper used for decoration or advertising | Synonyms: banner |
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| (noun) a long flag; often tapering | Synonyms: pennant, pennon, waft |
| (noun) a newspaper headline that runs across the full page | Synonyms: banner |
| (noun) light that streams | - |
| streaming | (noun) the circulation of cytoplasm within a cell | Synonyms: cyclosis |
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| streamlet | (noun) a small stream | Synonyms: rill, rivulet, run, runnel |
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| streamliner | (noun) a streamlined train | - |
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| street | (noun) a thoroughfare (usually including sidewalks) that is lined with buildings | - |
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| (noun) the part of a thoroughfare between the sidewalks; the part of the thoroughfare on which vehicles travel | - |
| (noun) people living or working on the same street | - |
| (noun) the streets of a city viewed as a depressed environment in which there is poverty and crime and prostitution and dereliction | - |
| (noun) a situation offering opportunities | - |
| streetcar | (noun) a wheeled vehicle that runs on rails and is propelled by electricity | Synonyms: tram, tramcar, trolley, trolley car |
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| streetlight | (noun) a lamp supported on a lamppost; for illuminating a street | Synonyms: street lamp |
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| streetwalker | (noun) a prostitute who attracts customers by walking the streets | Synonyms: floozie, floozy, hooker, hustler, slattern, street girl |
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| strength | (noun) the property of being physically or mentally strong | - |
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| (noun) an asset of special worth or utility | Synonyms: forte, long suit, metier, speciality, specialty, strong point, strong suit |
| (noun) permanence by virtue of the power to resist stress or force | Synonyms: durability, enduringness, lastingness |
| (noun) the amount of energy transmitted (as by acoustic or electromagnetic radiation) | Synonyms: intensity, intensity level |
| (noun) capability in terms of personnel and materiel that affect the capacity to fight a war | Synonyms: military capability, military posture, military strength, posture |
| (noun) physical energy or intensity | Synonyms: force, forcefulness |
| (noun) capacity to produce strong physiological or chemical effects | Synonyms: effectiveness, potency |
| (noun) the power to induce the taking of a course of action or the embracing of a point of view by means of argument or entreaty | Synonyms: persuasiveness |
| (noun) the condition of financial success | - |
| strengthener | (noun) a device designed to provide additional strength | Synonyms: reinforcement |
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| strengthening | (noun) the act of increasing the strength of something | - |
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| (noun) becoming stronger | - |
| strenuosity | (noun) intense energy | Synonyms: athleticism |
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| strenuousness | (noun) extreme effortfulness | Synonyms: arduousness |
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| strep | (noun) spherical Gram-positive bacteria occurring in pairs or chains; cause e.g. scarlet fever and tonsillitis | Synonyms: streptococci, streptococcus |
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| streptobacillus | (noun) any of various rod-shaped Gram-negative bacteria | - |
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| streptocarpus | (noun) any of various plants of the genus Streptocarpus having leaves in a basal rosette and flowers like primroses | - |
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| streptococci | (noun) spherical Gram-positive bacteria occurring in pairs or chains; cause e.g. scarlet fever and tonsillitis | Synonyms: strep, streptococcus |
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| streptococcus | (noun) spherical Gram-positive bacteria occurring in pairs or chains; cause e.g. scarlet fever and tonsillitis | Synonyms: strep, streptococci |
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| streptodornase | (noun) an enzyme produced by some hemolytic strains of streptococcus that dissolves fibrinous secretions from infections; used medicinally (often in combination with streptokinase) | - |
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| streptokinase | (noun) an enzyme produced by some strains of streptococcus that can liquefy blood clots by converting plasminogen to plasmin; used medicinally in some cases of myocardial infarction and pulmonary embolism | - |
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| streptolysin | (noun) any of several hemolysins derived from strains of streptococcus | - |
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| streptomyces | (noun) aerobic bacteria (some of which produce the antibiotic streptomycin) | - |
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| streptomycin | (noun) an antibiotic produced by the actinomycete Streptomyces griseus and used to treat tuberculosis | - |
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| streptothricin | (noun) a basic antibiotic derived from a soil actinomycete | - |
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| stress | (noun) the relative prominence of a syllable or musical note (especially with regard to stress or pitch) | Synonyms: accent, emphasis |
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| (noun) (physics) force that produces strain on a physical body | - |
| (noun) (psychology) a state of mental or emotional strain or suspense | Synonyms: tenseness, tension |
| (noun) difficulty that causes worry or emotional tension | Synonyms: strain |
| (noun) special emphasis attached to something | Synonyms: focus |
| stressor | (noun) any agent that causes stress to an organism | - |
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| stretch | (noun) exercise designed to extend the limbs and muscles to their full extent | Synonyms: stretching |
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| (noun) the act of physically reaching or thrusting out | Synonyms: reach, reaching |
| (noun) extension to or beyond the ordinary limit | - |
| (noun) a straightaway section of a racetrack | - |
| (noun) the capacity for being stretched | Synonyms: stretchability, stretchiness |
| (noun) a large and unbroken expanse or distance | - |
| (noun) an unbroken period of time during which you do something | Synonyms: stint |
| stretchability | (noun) the capacity for being stretched | Synonyms: stretch, stretchiness |
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| stretcher | (noun) a litter for transporting people who are ill or wounded or dead; usually consists of a sheet of canvas stretched between two poles | - |
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| (noun) a stone that forms the top of wall or building | Synonyms: capstone, copestone, coping stone |
| (noun) a mechanical device used to make something larger (as shoes or gloves) by stretching it | - |
| (noun) a wooden framework on which canvas is stretched and fixed for oil painting | - |
| stretchiness | (noun) the capacity for being stretched | Synonyms: stretch, stretchability |
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| stretching | (noun) exercise designed to extend the limbs and muscles to their full extent | Synonyms: stretch |
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| (noun) act of expanding by lengthening or widening | - |
| streusel | (noun) a crumbly topping for a pastry | - |
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| (noun) pastry with a topping of streusel | - |
| strewing | (noun) the act of scattering | Synonyms: scatter, scattering |
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| subtreasury | (noun) a subordinate treasury or place of deposit | - |
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| swingletree | (noun) a crossbar that is attached to the traces of a draft horse and to the vehicle or implement that the horse is pulling | Synonyms: whiffletree, whippletree |
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| taskmistress | (noun) a woman taskmaster | - |
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| temptress | (noun) a woman who is considered to be dangerously seductive | Synonyms: Delilah, enchantress, femme fatale, siren |
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| tetrel | (noun) any chemical element that belongs to the carbon group. | Synonyms: carbon group element, crystallogen, Group 14 element, tetragen |
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| theatre | (noun) a building where theatrical performances or motion-picture shows can be presented | Synonyms: house, theater |
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| (noun) the art of writing and producing plays | Synonyms: dramatic art, dramatics, dramaturgy, theater |
| (noun) a region in which active military operations are in progress | Synonyms: field, field of operations, theater, theater of operations, theatre of operations |
| theatregoer | (noun) someone who attends the theater | Synonyms: playgoer, theatergoer |
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| titre | (noun) the concentration of a solution as determined by titration | Synonyms: titer |
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| traitress | (noun) female traitor | - |
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| treacherousness | (noun) The characteristic of providing insecure footing or support; of being marked by hidden dangers, hazards, or perils. | - |
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| treachery | (noun) an act of deliberate betrayal | Synonyms: betrayal, perfidy, treason |
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| (noun) betrayal of a trust | Synonyms: perfidiousness, perfidy |
| treacle | (noun) writing or music that is excessively sweet and sentimental | Synonyms: glop, mush, slop |
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| (noun) a pale cane syrup | Synonyms: golden syrup |
| tread | (noun) a step in walking or running | Synonyms: pace, stride |
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| (noun) structural member consisting of the horizontal part of a stair or step | - |
| (noun) the part (as of a wheel or shoe) that makes contact with the ground | - |
| (noun) the grooved surface of a pneumatic tire | - |
| treadle | (noun) a lever that is operated with the foot | Synonyms: foot lever, foot pedal, pedal |
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| treadmill | (noun) a job involving drudgery and confinement | Synonyms: salt mine |
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| (noun) a mill that is powered by men or animals walking on a circular belt or climbing steps | Synonyms: tread-wheel, treadwheel |
| (noun) an exercise device consisting of an endless belt on which a person can walk or jog without changing place | - |