| inflorescence | (noun) the flowering part of a plant or arrangement of flowers on a stalk | - |
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| (noun) the time and process of budding and unfolding of blossoms | Synonyms: anthesis, blossoming, efflorescence, florescence, flowering |
| infructescence | (noun) the fruiting stage of the inflorescence | - |
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| inosculation | (noun) a natural or surgical joining of parts or branches of tubular structures so as to make or become continuous | Synonyms: anastomosis |
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| inscription | (noun) the activity of inscribing (especially carving or engraving) letters or words | - |
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| (noun) letters inscribed (especially words engraved or carved) on something | Synonyms: lettering |
| (noun) a short message (as in a book or musical work or on a photograph) dedicating it to someone or something | Synonyms: dedication |
| inscrutability | (noun) the quality of being impossible to investigate | - |
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| intumescence | (noun) the increase in volume of certain substances when they are heated (often accompanied by release of water) | Synonyms: intumescency, swelling |
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| (noun) swelling up with blood or other fluids (as with congestion) | Synonyms: intumescency |
| intumescency | (noun) the increase in volume of certain substances when they are heated (often accompanied by release of water) | Synonyms: intumescence, swelling |
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| (noun) swelling up with blood or other fluids (as with congestion) | Synonyms: intumescence |
| intussusception | (noun) (biology) growth in the surface area of a cell by the deposit of new particles between existing particles in the cell wall | - |
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| (noun) the folding in of an outer layer so as to form a pocket in the surface | Synonyms: infolding, introversion, invagination |
| irascibility | (noun) a feeling of resentful anger | Synonyms: quick temper, short temper, spleen |
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| iridescence | (noun) the visual property of something having a milky brightness and a play of colors from the surface | Synonyms: opalescence |
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| ischaemia | (noun) local anemia in a given body part sometimes resulting from vasoconstriction or thrombosis or embolism | Synonyms: ischemia |
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| ischemia | (noun) local anemia in a given body part sometimes resulting from vasoconstriction or thrombosis or embolism | Synonyms: ischaemia |
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| ischium | (noun) one of the three sections of the hipbone; situated below the ilium | Synonyms: ischial bone, os ischii |
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| jackscrew | (noun) screw-operated jack | Synonyms: screw jack |
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| juvenescence | (noun) the process of growing into a youth | - |
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| kaleidoscope | (noun) an optical toy in a tube; it produces symmetrical patterns as bits of colored glass are reflected by mirrors | - |
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| (noun) a complex pattern of constantly changing colors and shapes | - |
| keratoscleritis | (noun) inflammation of the cornea and sclera of the eye | - |
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| keratoscope | (noun) medical instrument to examine the cornea in order to detect irregularities in its anterior surface | - |
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| keratoscopy | (noun) examination of the cornea with a keratoscope to detect irregularities in its anterior surface | - |
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| kinescope | (noun) a cathode-ray tube in a television receiver; translates the received signal into a picture on a luminescent screen | Synonyms: picture tube, television tube |
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| kirsch | (noun) from fermented juice of black morello cherries | - |
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| kitsch | (noun) excessively garish or sentimental art; usually considered in bad taste | - |
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| landscape | (noun) a genre of art dealing with the depiction of natural scenery | Synonyms: landscape painting |
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| (noun) painting depicting an expanse of natural scenery | - |
| (noun) an extensive mental viewpoint | - |
| (noun) an expanse of scenery that can be seen in a single view | - |
| landscaper | (noun) someone who arranges features of the landscape or garden attractively | Synonyms: landscape architect, landscape gardener, landscapist |
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| landscaping | (noun) working as a landscape gardener | Synonyms: landscape gardening |
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| (noun) a garden laid out for esthetic effect | - |
| landscapist | (noun) someone who paints landscapes | - |
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| (noun) someone who arranges features of the landscape or garden attractively | Synonyms: landscape architect, landscape gardener, landscaper |
| laparoscope | (noun) a slender endoscope inserted through an incision in the abdominal wall in order to examine the abdominal organs or to perform minor surgery | - |
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| laparoscopy | (noun) laparotomy performed with a laparoscope that makes a small incision to examine the abdominal cavity (especially the ovaries and Fallopian tubes) | - |
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| laryngoscope | (noun) a medical instrument for examining the larynx | - |
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| lascar | (noun) an East Indian sailor | - |
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| lasciviousness | (noun) feeling morbid sexual desire or a propensity to lewdness | Synonyms: carnality, lubricity, prurience, pruriency |
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| lemniscate | (noun) any of several plane algebraic curves in the shape of a figure eight | - |
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| lemniscus | (noun) a bundle of sensory nerve fibers going to the thalamus | Synonyms: fillet |
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| lobscouse | (noun) a stew of meat and vegetables and hardtack that is eaten by sailors | Synonyms: lobscuse, scouse |
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| lobscuse | (noun) a stew of meat and vegetables and hardtack that is eaten by sailors | Synonyms: lobscouse, scouse |
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| luminescence | (noun) light from nonthermal sources | Synonyms: glow |
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| (noun) light not due to incandescence; occurs at low temperatures | - |
| lusciousness | (noun) extreme appetizingness | Synonyms: delectability, deliciousness, toothsomeness |
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| majuscule | (noun) one of the large alphabetic characters used as the first letter in writing or printing proper names and sometimes for emphasis | Synonyms: capital, capital letter, upper-case letter, uppercase |
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| manuscript | (noun) the form of a literary work submitted for publication | Synonyms: ms |
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| (noun) handwritten book or document | Synonyms: holograph |
| marasca | (noun) Dalmatian bitter wild cherry tree bearing fruit whose juice is made into maraschino liqueur | Synonyms: marasca cherry, maraschino cherry, Prunus cerasus marasca |
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| (noun) small bitter fruit of the marasca cherry tree from whose juice maraschino liqueur is made | - |
| maraschino | (noun) cherry preserved in true or imitation maraschino liqueur | Synonyms: maraschino cherry |
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| (noun) distilled from fermented juice of bitter wild marasca cherries | Synonyms: maraschino liqueur |
| mascara | (noun) makeup that is used to darken and thicken the eye lashes | - |
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| mascarpone | (noun) soft mild Italian cream cheese | - |
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| mascot | (noun) a character, animal or object that is adopted by a team or group as a symbolic figure | - |
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| masculine | (noun) a gender that refers chiefly (but not exclusively) to males or to objects classified as male | - |
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| masculinisation | (noun) the abnormal development of male sexual characteristics in a female (usually as the result of hormone therapies or adrenal malfunction) | Synonyms: masculinization, virilisation, virilization |
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| masculinity | (noun) the properties characteristic of the male sex | Synonyms: maleness |
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| (noun) the trait of behaving in ways considered typical for men | - |
| masculinization | (noun) the abnormal development of male sexual characteristics in a female (usually as the result of hormone therapies or adrenal malfunction) | Synonyms: masculinisation, virilisation, virilization |
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| meerschaum | (noun) a pipe having a bowl made of meerschaum | - |
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| (noun) a white clayey mineral | Synonyms: sepiolite |
| meniscectomy | (noun) surgical removal of the meniscus of the knee | - |
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| meniscus | (noun) (physics) the curved upper surface of a nonturbulent liquid in a vertical tube | - |
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| (noun) (optics) a lens that is concave on one side and convex on the other | - |
| (noun) (anatomy) a disk of cartilage that serves as a cushion between the ends of bones that meet at a joint | Synonyms: semilunar cartilage |
| mensch | (noun) a decent responsible person with admirable characteristics | Synonyms: mensh |
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| mescal | (noun) a colorless Mexican liquor distilled from fermented juices of certain desert plants of the genus Agavaceae (especially the century plant) | - |
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| (noun) a small spineless globe-shaped cactus; source of mescal buttons | Synonyms: Lophophora williamsii, mezcal, peyote |
| mescaline | (noun) the hallucinatory alkaloid that is the active agent in mescal buttons | Synonyms: peyote |
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| microscope | (noun) magnifier of the image of small objects | - |
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| microscopist | (noun) a scientist who specializes in research with the use of microscopes | - |
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| microscopy | (noun) research with the use of microscopes | - |
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| minuscule | (noun) a small cursive script developed from uncial between the 7th and 9th centuries and used in medieval manuscripts | - |
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| (noun) the characters that were once kept in bottom half of a compositor's type case | Synonyms: lower-case letter, lowercase, small letter |
| miscalculation | (noun) a mistake in calculating | Synonyms: misestimation, misreckoning |
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| miscarriage | (noun) a natural loss of the products of conception | Synonyms: spontaneous abortion, stillbirth |
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| (noun) failure of a plan | Synonyms: abortion |
| miscegenation | (noun) reproduction by parents of different races (especially by white and non-white persons) | Synonyms: crossbreeding, interbreeding |
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| miscellanea | (noun) a collection containing a variety of sorts of things | Synonyms: assortment, miscellany, mixed bag, mixture, motley, potpourri, salmagundi, smorgasbord, variety |
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| miscellany | (noun) an anthology of short literary pieces and poems and ballads etc. | Synonyms: florilegium, garland |
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| (noun) a collection containing a variety of sorts of things | Synonyms: assortment, miscellanea, mixed bag, mixture, motley, potpourri, salmagundi, smorgasbord, variety |
| mischance | (noun) an instance of misfortune | Synonyms: misadventure, mishap |
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| (noun) an unpredictable outcome that is unfortunate | Synonyms: bad luck, mishap |
| mischief | (noun) reckless or malicious behavior that causes discomfort or annoyance in others | Synonyms: devilment, devilry, deviltry, mischief-making, mischievousness, rascality, roguery, roguishness, shenanigan |
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| (noun) the quality or nature of being harmful or evil | Synonyms: balefulness, maleficence |
| mischievousness | (noun) reckless or malicious behavior that causes discomfort or annoyance in others | Synonyms: devilment, devilry, deviltry, mischief-making, mischief, rascality, roguery, roguishness, shenanigan |
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| (noun) an attribute of mischievous children | Synonyms: badness, naughtiness |
| (noun) the trait of behaving like an imp | Synonyms: impishness, puckishness, whimsicality |
| misconception | (noun) an incorrect conception | - |
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| misconduct | (noun) activity that transgresses moral or civil law | Synonyms: actus reus, wrongdoing, wrongful conduct |
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| (noun) bad or dishonest management by persons supposed to act on another's behalf | - |
| misconstrual | (noun) a kind of misinterpretation resulting from putting a wrong construction on words or actions (often deliberately) | Synonyms: misconstruction |
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| misconstruction | (noun) an ungrammatical constituent | - |
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| (noun) a kind of misinterpretation resulting from putting a wrong construction on words or actions (often deliberately) | Synonyms: misconstrual |
| miscount | (noun) an inaccurate count | - |
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| miscreant | (noun) a person without moral scruples | Synonyms: reprobate |
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| miscreation | (noun) something abnormal or anomalous | Synonyms: malformation |
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| miscue | (noun) a faulty shot in billiards; the cue tip slips off the cue ball | - |
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| (noun) a minor inadvertent mistake usually observed in speech or writing or in small accidents or memory lapses etc. | Synonyms: parapraxis, slip-up, slip |
| mittelschmerz | (noun) pain in the area of the ovary that is felt at the time of ovulation (usually midway through the menstrual cycle) | - |
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| mollusc | (noun) invertebrate having a soft unsegmented body usually enclosed in a shell | Synonyms: mollusk, shellfish |
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| molluscum | (noun) any skin disease characterized by soft pulpy nodules | - |
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| mucoviscidosis | (noun) the most common hereditary disease; the child's lungs and intestines and pancreas become clogged with thick mucus; caused by defect in a single gene; no cure is known | Synonyms: CF, cystic fibrosis, fibrocystic disease of the pancreas, pancreatic fibrosis |
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| muscadel | (noun) wine from muscat grapes | Synonyms: muscadelle, muscat, muscatel |
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| muscadelle | (noun) wine from muscat grapes | Synonyms: muscadel, muscat, muscatel |
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| muscadine | (noun) dull-purple grape of southern United States | Synonyms: bullace grape |
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| (noun) native grape of southeastern United States; origin of many cultivated varieties | Synonyms: Vitis rotundifolia |
| muscat | (noun) sweet aromatic grape used for raisins and wine | Synonyms: muscat grape, muscatel |
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| (noun) wine from muscat grapes | Synonyms: muscadel, muscadelle, muscatel |
| (noun) any of several cultivated grapevines that produce sweet white grapes | Synonyms: muskat |
| muscatel | (noun) sweet aromatic grape used for raisins and wine | Synonyms: muscat, muscat grape |
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| (noun) wine from muscat grapes | Synonyms: muscadel, muscadelle, muscat |
| muscle | (noun) possessing muscular strength | Synonyms: brawn, brawniness, heftiness, muscularity, sinew |
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| (noun) authority or power or force (especially when used in a coercive way) | - |
| (noun) one of the contractile organs of the body | Synonyms: musculus |
| (noun) animal tissue consisting predominantly of contractile cells | Synonyms: muscular tissue |
| (noun) a bully employed as a thug or bodyguard | Synonyms: muscleman |
| musclebuilder | (noun) someone who does special exercises to develop a brawny musculature | Synonyms: bodybuilder, muscle-builder, muscle builder, muscleman |
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| musclebuilding | (noun) exercise that builds muscles through tension | Synonyms: anaerobic exercise, bodybuilding, muscle building |
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| muscleman | (noun) a bully employed as a thug or bodyguard | Synonyms: muscle |
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| (noun) someone who does special exercises to develop a brawny musculature | Synonyms: bodybuilder, muscle-builder, muscle builder, musclebuilder |
| muscovite | (noun) a colorless or pale brown mica with potassium | - |
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| muscularity | (noun) possessing muscular strength | Synonyms: brawn, brawniness, heftiness, muscle, sinew |
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| (noun) an imaginative lively style (especially style of writing) | Synonyms: energy, vigor, vigour, vim |
| (noun) the physiological state of having or consisting of muscle | - |
| musculature | (noun) the muscular system of an organism | Synonyms: muscle system, muscular structure |
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| musculus | (noun) one of the contractile organs of the body | Synonyms: muscle |
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| nascence | (noun) the event of being born | Synonyms: birth, nascency, nativity |
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| nascency | (noun) the event of being born | Synonyms: birth, nascence, nativity |
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| nephoscope | (noun) a measuring instrument that uses a grid for measuring the altitude, direction, and velocity of movement of clouds | - |
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| nephroangiosclerosis | (noun) kidney disease that is usually associated with hypertension; sclerosis of the renal arterioles reduces blood flow that can lead to kidney failure and heart failure | Synonyms: nephrosclerosis |
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| nephrosclerosis | (noun) kidney disease that is usually associated with hypertension; sclerosis of the renal arterioles reduces blood flow that can lead to kidney failure and heart failure | Synonyms: nephroangiosclerosis |
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| nescience | (noun) ignorance (especially of orthodox beliefs) | Synonyms: ignorantness, unknowing, unknowingness |
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| neuroscience | (noun) the scientific study of the nervous system | - |
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| neuroscientist | (noun) a neurobiologist who specializes in the study of the brain | - |
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| newscast | (noun) a broadcast of news or commentary on the news | - |
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