| lesbianism | (noun) female homosexuality | Synonyms: sapphism |
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| lesion | (noun) any localized abnormal structural change in a bodily part | - |
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| (noun) an injury to living tissue (especially an injury involving a cut or break in the skin) | Synonyms: wound |
| lespedeza | (noun) shrubby or herbaceous plants widely used for forage, soil improvement, and especially hay in southern United States | Synonyms: bush clover |
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| lessee | (noun) a tenant who holds a lease | Synonyms: leaseholder |
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| lessening | (noun) a change downward | Synonyms: decrease, drop-off |
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| lesson | (noun) a task assigned for individual study | - |
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| (noun) a unit of instruction | - |
| (noun) punishment intended as a warning to others | Synonyms: deterrent example, example, object lesson |
| (noun) the significance of a story or event | Synonyms: moral |
| lessor | (noun) someone who grants a lease | Synonyms: lease giver |
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| let | (noun) a serve that strikes the net before falling into the receiver's court; the ball must be served again | Synonyms: net ball |
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| letch | (noun) man with strong sexual desires | Synonyms: lech, lecher, satyr |
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| letdown | (noun) a feeling of dissatisfaction that results when your expectations are not realized | Synonyms: disappointment |
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| lethality | (noun) the quality of being deadly | Synonyms: deadliness |
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| lethargy | (noun) weakness characterized by a lack of vitality or energy | Synonyms: inanition, lassitude, slackness |
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| (noun) inactivity; showing an unusual lack of energy | Synonyms: flatness, languor, phlegm, sluggishness |
| (noun) a state of comatose torpor (as found in sleeping sickness) | Synonyms: lassitude, sluggishness |
| letter | (noun) a written message addressed to a person or organization | Synonyms: missive |
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| (noun) the conventional characters of the alphabet used to represent speech | Synonyms: alphabetic character, letter of the alphabet |
| (noun) an award earned by participation in a school sport | Synonyms: varsity letter |
| (noun) a strictly literal interpretation (as distinct from the intention) | - |
| (noun) owner who lets another person use something (housing usually) for hire | - |
| lettercard | (noun) a postcard that folds so the message is inside | - |
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| letterer | (noun) a painter of letters | - |
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| letterhead | (noun) a sheet of stationery with name and address of the organization printed at the top | - |
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| lettering | (noun) letters inscribed (especially words engraved or carved) on something | Synonyms: inscription |
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| letterman | (noun) an athlete who has earned a letter in a school sport | - |
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| letterpress | (noun) printing from a plate with raised characters | Synonyms: relief printing |
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| letters | (noun) the literary culture | - |
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| (noun) scholarly attainment | - |
| letting | (noun) property that is leased or rented out or let | Synonyms: lease, rental |
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| lettuce | (noun) leaves of any of various plants of Lactuca sativa | - |
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| (noun) any of various plants of the genus Lactuca | - |
| (noun) informal terms for money | Synonyms: boodle, bread, cabbage, clams, dinero, dough, gelt, kale, lolly, loot, lucre, moolah, pelf, scratch, shekels, simoleons, sugar, wampum |
| letup | (noun) a pause during which things are calm or activities are diminished | Synonyms: lull |
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| leu | (noun) the basic unit of money in Romania | - |
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| (noun) the basic unit of money in Moldova | - |
| leucaemia | (noun) malignant neoplasm of blood-forming tissues; characterized by abnormal proliferation of leukocytes; one of the four major types of cancer | Synonyms: cancer of the blood, leukaemia, leukemia |
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| leucine | (noun) a white crystalline amino acid occurring in proteins that is essential for nutrition; obtained by the hydrolysis of most dietary proteins | - |
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| leucocyte | (noun) blood cells that engulf and digest bacteria and fungi; an important part of the body's defense system | Synonyms: leukocyte, WBC, white blood cell, white blood corpuscle, white cell, white corpuscle |
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| leucocytosis | (noun) an abnormal increase in the number of white blood cells in the blood as a result of infection (as in leukemia) | Synonyms: leukocytosis |
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| leucocytozoan | (noun) parasitic in birds | Synonyms: leucocytozoon |
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| leucocytozoon | (noun) parasitic in birds | Synonyms: leucocytozoan |
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| leucoma | (noun) eye disease consisting of an opaque white spot on the cornea | Synonyms: leukoma |
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| leucopenia | (noun) an abnormal lowering of the white blood cell count | Synonyms: leukopenia |
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| leucorrhea | (noun) discharge of white mucous material from the vagina; often an indication of infection | Synonyms: leukorrhea |
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| leucothoe | (noun) any plant of the genus Leucothoe; grown for their beautiful white flowers; glossy foliage contains a poisonous substance similar to that found in genus Kalmia | - |
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| leucotomy | (noun) surgical interruption of nerve tracts to and from the frontal lobe of the brain; often results in marked cognitive and personality changes | Synonyms: frontal lobotomy, leukotomy, lobotomy, prefrontal leucotomy, prefrontal leukotomy, prefrontal lobotomy |
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| leukaemia | (noun) malignant neoplasm of blood-forming tissues; characterized by abnormal proliferation of leukocytes; one of the four major types of cancer | Synonyms: cancer of the blood, leucaemia, leukemia |
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| leukemia | (noun) malignant neoplasm of blood-forming tissues; characterized by abnormal proliferation of leukocytes; one of the four major types of cancer | Synonyms: cancer of the blood, leucaemia, leukaemia |
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| leukocyte | (noun) blood cells that engulf and digest bacteria and fungi; an important part of the body's defense system | Synonyms: leucocyte, WBC, white blood cell, white blood corpuscle, white cell, white corpuscle |
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| leukocytosis | (noun) an abnormal increase in the number of white blood cells in the blood as a result of infection (as in leukemia) | Synonyms: leucocytosis |
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| leukoderma | (noun) a congenital skin condition characterized by spots or bands of unpigmented skin | - |
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| leukoencephalitis | (noun) inflammation of the white matter of the brain | - |
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| leukoma | (noun) eye disease consisting of an opaque white spot on the cornea | Synonyms: leucoma |
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| leukopenia | (noun) an abnormal lowering of the white blood cell count | Synonyms: leucopenia |
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| leukorrhea | (noun) discharge of white mucous material from the vagina; often an indication of infection | Synonyms: leucorrhea |
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| leukotomy | (noun) surgical interruption of nerve tracts to and from the frontal lobe of the brain; often results in marked cognitive and personality changes | Synonyms: frontal lobotomy, leucotomy, lobotomy, prefrontal leucotomy, prefrontal leukotomy, prefrontal lobotomy |
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| lev | (noun) the basic unit of money in Bulgaria | - |
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| levallorphan | (noun) drug (trade name Lorfan) that is related to morphine but that counteracts the respiratory depression produced by morphine poisoning but without affecting its analgesic effects | Synonyms: Lorfan |
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| levanter | (noun) an easterly wind in the western Mediterranean area | - |
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| levator | (noun) a muscle that serves to lift some body part (as the eyelid or lip) | - |
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| levee | (noun) an embankment that is built in order to prevent a river from overflowing | - |
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| (noun) a pier that provides a landing place on a river | - |
| (noun) a formal reception of visitors or guests (as at a royal court) | - |
| level | (noun) indicator that establishes the horizontal when a bubble is centered in a tube of liquid | Synonyms: spirit level |
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| (noun) a structure consisting of a room or set of rooms at a single position along a vertical scale | Synonyms: floor, storey, story |
| (noun) a flat surface at right angles to a plumb line | Synonyms: horizontal surface |
| (noun) a position on a scale of intensity or amount or quality | Synonyms: degree, grade |
| (noun) height above ground | - |
| (noun) an abstract place usually conceived as having depth | Synonyms: layer, stratum |
| (noun) a specific identifiable position in a continuum or series or especially in a process | Synonyms: degree, point, stage |
| (noun) a relative position or degree of value in a graded group | Synonyms: grade, tier |
| leveler | (noun) a radical who advocates the abolition of social distinctions | Synonyms: leveller |
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| levelheadedness | (noun) the property of having or showing sound judgment. | - |
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| leveling | (noun) the act of making equal or uniform | Synonyms: equalisation, equalization |
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| (noun) complete destruction of a building | Synonyms: demolishing, razing, tearing down |
| (noun) changing the ground level to a smooth horizontal or gently sloping surface | Synonyms: grading |
| leveller | (noun) a radical who advocates the abolition of social distinctions | Synonyms: leveler |
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| levelness | (noun) The property of being the same height at all places; parallel to a flat ground. | - |
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| lever | (noun) a rigid bar pivoted about a fulcrum | - |
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| (noun) a flat metal tumbler in a lever lock | Synonyms: lever tumbler |
| (noun) a simple machine that gives a mechanical advantage when given a fulcrum | - |
| leverage | (noun) investing with borrowed money as a way to amplify potential gains (at the risk of greater losses) | Synonyms: leveraging |
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| (noun) strategic advantage; power to act effectively | - |
| (noun) the mechanical advantage gained by being in a position to use a lever | Synonyms: purchase |
| leveraging | (noun) investing with borrowed money as a way to amplify potential gains (at the risk of greater losses) | Synonyms: leverage |
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| leveret | (noun) a young hare especially one in its first year | - |
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| leviathan | (noun) the largest or most massive thing of its kind | - |
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| (noun) monstrous sea creature symbolizing evil in the Old Testament | - |
| levirate | (noun) the biblical institution whereby a man must marry the widow of his childless brother in order to maintain the brother's line | - |
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| levis | (noun) a popular brand of jeans | Synonyms: Levi's |
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| levitation | (noun) the act of raising (a body) from the ground by presumably spiritualistic means | - |
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| (noun) movement upward in virtue of lightness | - |
| (noun) the phenomenon of a person or thing rising into the air by apparently supernatural means | - |
| levity | (noun) a manner lacking seriousness | - |
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| (noun) feeling an inappropriate lack of seriousness | - |
| levodopa | (noun) the levorotatory form of dopa (trade names Bendopa and Brocadopa and Larodopa); as a drug it is used to treat Parkinson's disease | Synonyms: Bendopa, Brocadopa, L-dopa, Larodopa |
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| levorotation | (noun) rotation to the left | Synonyms: counterclockwise rotation |
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| levulose | (noun) a simple sugar found in honey and in many ripe fruits | Synonyms: fructose, fruit sugar, laevulose |
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| levy | (noun) the act of drafting into military service | Synonyms: levy en masse |
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| (noun) a charge imposed and collected | - |
| lewdness | (noun) the trait of behaving in an obscene manner | Synonyms: bawdiness, obscenity, salaciousness, salacity |
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| lexeme | (noun) a minimal unit (as a word or stem) in the lexicon of a language; `go' and `went' and `gone' and `going' are all members of the English lexeme `go' | - |
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| lexicalisation | (noun) the process of making a word to express a concept | Synonyms: lexicalization |
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| lexicalization | (noun) the process of making a word to express a concept | Synonyms: lexicalisation |
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| lexicographer | (noun) a compiler or writer of a dictionary; a student of the lexical component of language | Synonyms: lexicologist |
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| lexicography | (noun) the act of writing dictionaries | - |
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| lexicologist | (noun) a compiler or writer of a dictionary; a student of the lexical component of language | Synonyms: lexicographer |
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| lexicology | (noun) the branch of linguistics that studies the lexical component of language | - |
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| lexicon | (noun) a language user's knowledge of words | Synonyms: mental lexicon, vocabulary |
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| (noun) a reference book containing an alphabetical list of words with information about them | Synonyms: dictionary |
| lexicostatistics | (noun) a statistical technique used in glottochronology; used to estimate how long ago different languages evolved from a common source language | - |
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| lexis | (noun) all of the words in a language; all word forms having meaning or grammatical function | - |
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| ley | (noun) a field covered with grass or herbage and suitable for grazing by livestock | Synonyms: grazing land, lea, pasture, pasture land, pastureland |
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