| abiogenist | (noun) a believer in abiogenesis | - |
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| acetylenic | (adjective) of or related to acetylene | - |
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| achenial | (adjective) pertaining to dry one-seeded indehiscent fruit | - |
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| acrogenic | (adjective) pertaining to flowerless plants (ferns or mosses) in which growth occurs only at the tip of the main stem | Synonyms: acrogenous |
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| adenine | (noun) (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA | Synonyms: A |
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| adenitis | (noun) inflammation of a gland or lymph node | - |
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| alienism | (noun) the quality of being alien | Synonyms: alienage |
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| (noun) an obsolete term for the study and treatment of mental illness | - |
| alienist | (noun) a psychiatrist and specialist in the legal aspects of mental illness | - |
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| allergenic | (adjective) relating to or having the effect of an allergen | - |
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| amenia | (noun) absence or suppression of normal menstrual flow | Synonyms: amenorrhea, amenorrhoea |
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| amenities | (noun) things that make you comfortable and at ease | Synonyms: comforts, conveniences, creature comforts |
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| amenity | (noun) pleasantness resulting from agreeable conditions | Synonyms: agreeableness |
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| andrenid | (noun) a bee that is a member of the genus Andrena | Synonyms: andrena, mining bee |
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| androgenic | (adjective) of or related to the male hormone androgen | - |
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| anorexigenic | (adjective) causing loss of appetite | Synonyms: anorectic |
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| anthropogenic | (adjective) of or relating to the study of the origins and development of human beings | Synonyms: anthropogenetic |
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| antigenic | (adjective) of or relating to antigens | - |
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| antivenin | (noun) an antitoxin that counteracts the effects of venom from the bite of a snake or insect or other animal | Synonyms: antivenene |
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| arenicolous | (adjective) growing or living or burrowing in sand | - |
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| arsenic | (noun) a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and in various alloys; found in arsenopyrite and orpiment and realgar | Synonyms: As, atomic number 33 |
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| (noun) a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer | Synonyms: arsenic trioxide, arsenous anhydride, arsenous oxide, ratsbane, white arsenic |
| arsenical | (adjective) relating to or containing arsenic | - |
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| (noun) a pesticide or drug containing arsenic | - |
| arsenide | (noun) a compound of arsenic with a more positive element | - |
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| arsenious | (adjective) relating to compounds in which arsenic is trivalent | - |
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| asthenia | (noun) an abnormal loss of strength | Synonyms: astheny |
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| asthenic | (adjective) having a slender physique | - |
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| (adjective) lacking energy or vitality | Synonyms: adynamic, debilitated, enervated |
| austenite | (noun) a solid solution of ferric carbide or carbon in iron; cools to form pearlite or martensite | - |
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| austenitic | (adjective) composed of austenite | - |
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| autogenic | (adjective) originating within the body | Synonyms: autogenous |
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| autogenics | (noun) training patients in self-induced relaxation | Synonyms: autogenic therapy, autogenic training |
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| awakening | (noun) the act of waking | Synonyms: wakening, waking up |
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| axenic | (adjective) (of experimental animals) raised under sterile conditions | - |
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| (adjective) (used of cultures of microorganisms) completely free from other organisms | - |
| benight | (verb) make darker and difficult to perceive by sight | Synonyms: bedim |
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| (verb) envelop with social, intellectual, or moral darkness | - |
| (verb) overtake with darkness or night | - |
| benighted | (adjective) lacking enlightenment or knowledge or culture | Synonyms: dark |
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| (adjective) overtaken by night or darkness | Synonyms: nighted |
| benign | (adjective) pleasant and beneficial in nature or influence | Synonyms: benignant |
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| (adjective) not dangerous to health; not recurrent or progressive (especially of a tumor) | - |
| (adjective) kindness of disposition or manner | - |
| benignancy | (noun) the quality of being kind and gentle | Synonyms: benignity, graciousness |
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| benignant | (adjective) pleasant and beneficial in nature or influence | Synonyms: benign |
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| (adjective) characterized by kindness and warm courtesy especially of a king to his subjects | Synonyms: gracious |
| benignantly | (adverb) in a benign manner | Synonyms: benignly |
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| benignity | (noun) a kind act | Synonyms: kindness |
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| (noun) the quality of being kind and gentle | Synonyms: benignancy, graciousness |
| benignly | (adverb) in a benign manner | Synonyms: benignantly |
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| benison | (noun) a spoken blessing | - |
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| benzylpenicillin | (noun) the penicillin that constitutes the principal component of many commercial antibiotics | Synonyms: penicillin G |
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| bergenia | (noun) any plant of the genus Bergenia; valued as an evergreen ground cover and for the spring blossoms | - |
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| bimillenial | (adjective) of or relating to a bimillennium | - |
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| biogenic | (adjective) produced by living organisms or biological processes | - |
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| (adjective) essential for maintaining the fundamental life processes | - |
| blackening | (noun) changing to a darker color | Synonyms: darkening |
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| broadening | (noun) the action of making broader | - |
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| (noun) the act of making something wider | Synonyms: widening |
| (noun) an increase in width | Synonyms: widening |
| cacogenic | (adjective) pertaining to or causing degeneration in the offspring produced | Synonyms: dysgenic |
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| cacogenics | (noun) the study of the operation of factors causing degeneration in the type of offspring produced | Synonyms: dysgenics |
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| caladenia | (noun) any of various orchids of the genus Caladenia | - |
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| calisthenic | (adjective) of or relating to calisthenics | - |
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| calisthenics | (noun) the practice of calisthenic exercises | Synonyms: callisthenics |
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| (noun) light exercises designed to promote general fitness | Synonyms: callisthenics |
| callisthenics | (noun) the practice of calisthenic exercises | Synonyms: calisthenics |
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| (noun) light exercises designed to promote general fitness | Synonyms: calisthenics |
| carcinogenic | (adjective) causing or tending to cause cancer | - |
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| carrageenin | (noun) a colloidal extract from carrageen seaweed and other red algae | Synonyms: carrageenan |
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| catamenia | (noun) the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause | Synonyms: flow, menses, menstruation, menstruum, period |
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| catamenial | (adjective) of or relating to menstruation or the menses | Synonyms: menstrual |
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| cerebromeningitis | (noun) inflammation of the brain and spinal cord and their meninges | Synonyms: encephalomeningitis, meningoencephalitis |
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| chastening | (noun) a rebuke for making a mistake | Synonyms: chastisement, correction |
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| chenille | (noun) a heavy fabric woven with chenille cord; used in rugs and bedspreads | - |
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| (noun) a soft tufted cord used in embroidery | Synonyms: chenille cord |
| chloramphenicol | (noun) an oral antibiotic (trade name Chloromycetin) used to treat serious infections (especially typhoid fever) | Synonyms: Chloromycetin |
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| choriomeningitis | (noun) a cerebral meningitis with cellular infiltration of the meninges | - |
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| christening | (noun) giving a Christian name at baptism | - |
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| collagenic | (adjective) relating to or consisting of collagen | Synonyms: collagenous |
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| comedogenic | (noun) A substance that tends to produce acne, such as by clogging pores on the skin. | Synonyms: comedogen, comedogenic substance |
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| congenial | (adjective) suitable to your needs | - |
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| (adjective) (used of plants) capable of cross-fertilization or of being grafted | - |
| congeniality | (noun) a congenial disposition | - |
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| (noun) compatibility between persons | Synonyms: congenialness |
| congenially | (adverb) in a congenial manner | - |
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| congenialness | (noun) compatibility between persons | Synonyms: congeniality |
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| congenital | (adjective) present at birth but not necessarily hereditary; acquired during fetal development | Synonyms: inborn, innate |
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| convenience | (noun) a device or control that is very useful for a particular job | Synonyms: appliance, contraption, contrivance, gadget, gismo, gizmo, widget |
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| (noun) a toilet that is available to the public | Synonyms: comfort station, public convenience, public lavatory, public toilet, restroom, toilet facility, wash room |
| (noun) the quality of being useful and convenient | - |
| (noun) the state of being suitable or opportune | - |
| conveniences | (noun) things that make you comfortable and at ease | Synonyms: amenities, comforts, creature comforts |
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| convenient | (adjective) suited to your comfort or purpose or needs | - |
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| (adjective) large and roomy (`convenient' is archaic in this sense) | Synonyms: commodious |
| conveniently | (adverb) in a convenient manner | Synonyms: handily |
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| convening | (noun) the act of convening | Synonyms: convention |
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| cosmogenic | (adjective) pertaining to the branch of astronomy dealing with the origin and history and structure and dynamics of the universe | Synonyms: cosmogonic, cosmogonical, cosmologic, cosmological |
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| cryogenic | (adjective) of or relating to very low temperatures | - |
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| cryogenics | (noun) the branch of physics that studies the phenomena that occur at very low temperatures | Synonyms: cryogeny |
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| ctenidium | (noun) comb-like respiratory structure serving as the gill of certain mollusks | - |
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| cyanogenic | (adjective) capable of producing cyanide | Synonyms: cyanogenetic |
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| cytopathogenic | (adjective) of or relating to or causing pathological changes in cells | - |
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| cytopenia | (noun) a deficiency of some cellular element of the blood | - |
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| dampening | (noun) the act of making something slightly wet | Synonyms: moistening |
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| darkening | (adjective) becoming dark or darker as from waning light or clouding over | - |
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| (noun) changing to a darker color | Synonyms: blackening |
| deadening | (adjective) so lacking in interest as to cause mental weariness | Synonyms: boring, dull, ho-hum, irksome, slow, tedious, tiresome, wearisome |
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| (noun) the act of making something futile and useless (as by routine) | Synonyms: constipation, impairment, stultification |
| deafening | (adjective) loud enough to cause (temporary) hearing loss | Synonyms: earsplitting, thunderous, thundery |
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| deepening | (adjective) accumulating and becoming more intense | Synonyms: thickening |
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| (noun) a process of becoming deeper and more profound | - |
| deniable | (adjective) capable of being denied or contradicted | - |
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| denial | (noun) a defendant's answer or plea denying the truth of the charges against him | Synonyms: defence, defense, demurrer |
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| (noun) renunciation of your own interests in favor of the interests of others | Synonyms: abnegation, self-abnegation, self-denial, self-renunciation |
| (noun) the act of refusing to comply (as with a request) | - |
| (noun) the act of asserting that something alleged is not true | Synonyms: disaffirmation |
| (noun) (psychiatry) a defense mechanism that denies painful thoughts | - |
| denier | (noun) any of various former European coins of different denominations | - |
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| (noun) a unit of measurement for the fineness of silk or nylon or rayon | - |
| (noun) one who denies | - |
| denigrate | (verb) cause to seem less serious; play down | Synonyms: belittle, derogate, minimize |
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| (verb) charge falsely or with malicious intent; attack the good name and reputation of someone | Synonyms: asperse, besmirch, calumniate, defame, slander, smear, smirch, sully |
| denigrating | (adjective) (used of statements) harmful and often untrue; tending to discredit or malign | Synonyms: calumniatory, calumnious, defamatory, denigrative, denigratory, libellous, libelous, slanderous |
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| denigration | (noun) the act of expressing disapproval (especially of yourself) | Synonyms: deprecation |
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| (noun) an abusive attack on a person's character or good name | Synonyms: aspersion, calumny, defamation, slander |
| (noun) a belittling comment | Synonyms: belittling |
| denigrative | (adjective) (used of statements) harmful and often untrue; tending to discredit or malign | Synonyms: calumniatory, calumnious, defamatory, denigrating, denigratory, libellous, libelous, slanderous |
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| denigratory | (adjective) (used of statements) harmful and often untrue; tending to discredit or malign | Synonyms: calumniatory, calumnious, defamatory, denigrating, denigrative, libellous, libelous, slanderous |
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| denim | (noun) a coarse durable twill-weave cotton fabric | Synonyms: dungaree, jean |
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| (noun) (used in the plural) close-fitting trousers of heavy denim for manual work or casual wear | Synonyms: blue jeans, jeans |
| denitrator | (noun) Any device used to remove nitrates or other nitrogen compounds, especially from water. | - |
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| denitrify | (verb) remove nitrogen from | - |
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| denivelation | (noun) the difference in level (depth) between two parts of a cave system, usually the highest and lowest known point. | - |
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| denizen | (noun) a plant or animal naturalized in a region | - |
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| (noun) a person who inhabits a particular place | Synonyms: dweller, habitant, indweller, inhabitant |
| dillenia | (noun) any of several evergreen trees or shrubs of the genus Dillenia grown for their foliage and nodding flowers resembling magnolias which are followed by fruit that is used in curries and jellies and preserves | - |
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