| anatotitan | (noun) one of the largest and most famous duck-billed dinosaurs | - |
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| asymptote | (noun) a straight line that is the limiting value of a curve; can be considered as tangent at infinity | - |
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| autotelism | (noun) belief that a work of art is an end in itself or its own justification | - |
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| autotomy | (noun) spontaneous removal or casting off of a body part (as the tail of a lizard or claw of a lobster) especially when the organism is injured or under attack | - |
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| autotroph | (noun) plant capable of synthesizing its own food from simple organic substances | Synonyms: autophyte, autophytic plant, autotrophic organism |
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| autotype | (noun) an exact copy or reproduction | Synonyms: facsimile |
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| (noun) process for producing permanent prints in a carbon pigment | Synonyms: autotypy |
| autotypy | (noun) process for producing permanent prints in a carbon pigment | Synonyms: autotype |
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| chemoautotroph | (noun) An organism that depends on chemicals for its energy and principally on carbon dioxide for its carbon. | Synonyms: chemotrophic autotroph |
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| cleistothecium | (noun) closed spore-bearing structure of some fungi (especially Aspergillaceae and Erysiphaceae) from which spores are released only by decay or disintegration | Synonyms: cleistocarp |
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| cytotoxicity | (noun) the degree to which something is toxic to living cells | - |
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| cytotoxin | (noun) any substance that has a toxic effect on cells | - |
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| ectotherm | (noun) an animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals | Synonyms: poikilotherm |
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| excitotoxin | (noun) any of a group of neurologically active compounds, such as glutamate and aspartame, that have detrimental excitatory effects on the central nervous system when taken in high concentrations. | - |
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| factotum | (noun) a servant employed to do a variety of jobs | - |
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| hepatotoxin | (noun) any toxin that affects the liver | - |
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| iontotherapy | (noun) therapy that uses a local electric current to introduce the ions of a medicine into the tissues | Synonyms: electromotive drug administration, EMDA, ionic medication, iontophoresis |
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| keratotomy | (noun) surgical incision into the cornea | - |
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| ketotetrose | (noun) A monosaccharide that has both a ketone and four carbons. | - |
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| ketotriose | (noun) Any ketose having three carbon atoms; in reality, only dihydroxyacetone. | - |
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| leptotene | (noun) the first stage of the prophase of meiosis | - |
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| litotes | (noun) understatement for rhetorical effect (especially when expressing an affirmative by negating its contrary) | Synonyms: meiosis |
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| pantothen | (noun) a vitamin of the vitamin B complex that performs an important role in the oxidation of fats and carbohydrates and certain amino acids; occurs in many foods | Synonyms: pantothenic acid |
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| phototelegraph | (noun) an apparatus for transmitting pictures by phototelegraphy. | - |
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| phototelegraphy | (noun) an early technology for the transmission of facsimiles. | - |
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| phototherapy | (noun) the use of strong light to treat acne or hyperbilirubinemia of the newborn | - |
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| phototropism | (noun) an orienting response to light | - |
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| phytotherapy | (noun) the use of plants or plant extracts for medicinal purposes (especially plants that are not part of the normal diet) | Synonyms: botanical medicine, herbal therapy |
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| phytotoxin | (noun) any substance produced by plants that is similar in its properties to extracellular bacterial toxin | Synonyms: plant toxin |
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| polyptoton | (noun) repetition of a word in a different case or inflection in the same sentence | - |
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| prototherian | (noun) primitive oviparous mammals found only in Australia and Tasmania and New Guinea | - |
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| prototype | (noun) a standard or typical example | Synonyms: epitome, image, paradigm |
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| somatotrophin | (noun) a hormone produced by the anterior pituitary gland; promotes growth in humans | Synonyms: growth hormone, human growth hormone, somatotrophic hormone, somatotropic hormone, somatotropin, STH |
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| somatotropin | (noun) a hormone produced by the anterior pituitary gland; promotes growth in humans | Synonyms: growth hormone, human growth hormone, somatotrophic hormone, somatotrophin, somatotropic hormone, STH |
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| somatotype | (noun) a category of physique | Synonyms: body type |
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| stotinka | (noun) 100 stotinka equal 1 lev in Bulgaria | - |
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| streptothricin | (noun) a basic antibiotic derived from a soil actinomycete | - |
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| subtotal | (noun) the sum of part of a group of numbers | - |
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| teetertotter | (noun) a plaything consisting of a board balanced on a fulcrum; the board is ridden up and down by children at either end | Synonyms: dandle board, seesaw, teeter-totter, teeter, teeterboard, tilting board |
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| teetotaler | (noun) a total abstainer | Synonyms: teetotalist, teetotaller |
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| teetotaling | (noun) abstaining from alcohol | Synonyms: teetotalism |
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| teetotalism | (noun) abstaining from alcohol | Synonyms: teetotaling |
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| teetotalist | (noun) a total abstainer | Synonyms: teetotaler, teetotaller |
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| teetotaller | (noun) a total abstainer | Synonyms: teetotaler, teetotalist |
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| teetotum | (noun) a conical child's plaything tapering to a steel point on which it can be made to spin | Synonyms: spinning top, top, whirligig |
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| tot | (noun) a young child who is just beginning to walk | Synonyms: bambino, toddler, yearling |
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| (noun) a small amount (especially of a drink) | - |
| total | (noun) the whole amount | Synonyms: aggregate, sum, totality |
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| (noun) a quantity obtained by the addition of a group of numbers | Synonyms: amount, sum |
| totalisator | (noun) computer that registers bets and divides the total amount bet among those who won | Synonyms: pari-mutuel machine, totaliser, totalizator, totalizer |
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| totaliser | (noun) a calculator that performs simple arithmetic functions | Synonyms: adding machine, totalizer |
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| (noun) computer that registers bets and divides the total amount bet among those who won | Synonyms: pari-mutuel machine, totalisator, totalizator, totalizer |
| totalism | (noun) an ideological belief in the complete and unrestricted power of government. | Synonyms: absolutism, totalitarianism |
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| totalitarian | (noun) an adherent of totalitarian principles or totalitarian government | - |
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| totalitarianism | (noun) an ideological belief in the complete and unrestricted power of government. | Synonyms: absolutism, totalism |
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| (noun) a form of government in which the ruler is an absolute dictator (not restricted by a constitution or laws or opposition etc.) | Synonyms: absolutism, authoritarianism, Caesarism, despotism, dictatorship, monocracy, one-man rule, shogunate, Stalinism, tyranny |
| totality | (noun) the whole amount | Synonyms: aggregate, sum, total |
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| (noun) the quality of being complete and indiscriminate | - |
| (noun) the state of being total and complete | Synonyms: entireness, entirety, integrality |
| totalizator | (noun) computer that registers bets and divides the total amount bet among those who won | Synonyms: pari-mutuel machine, totalisator, totaliser, totalizer |
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| totalizer | (noun) a calculator that performs simple arithmetic functions | Synonyms: adding machine, totaliser |
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| (noun) computer that registers bets and divides the total amount bet among those who won | Synonyms: pari-mutuel machine, totalisator, totaliser, totalizator |
| totara | (noun) valuable timber tree of New Zealand yielding hard reddish wood used for furniture and bridges and wharves | Synonyms: Podocarpus totara |
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| tote | (noun) a capacious bag or basket | Synonyms: carryall, holdall, tote bag |
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| totem | (noun) emblem consisting of an object such as an animal or plant; serves as the symbol of a family or clan (especially among American Indians) | - |
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| (noun) a clan or tribe identified by their kinship to a common totemic object | - |
| totemism | (noun) belief in the kinship of a group of people with a common totem | - |
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| totemist | (noun) a person who belongs to a clan or tribe having a totem | - |
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| toter | (noun) someone whose employment involves carrying something | Synonyms: bearer, carrier |
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| totipotence | (noun) the ability of a cell to give rise to unlike cells and so to develop a new organism or part | Synonyms: totipotency |
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| totipotency | (noun) the ability of a cell to give rise to unlike cells and so to develop a new organism or part | Synonyms: totipotence |
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| totterer | (noun) someone who walks unsteadily as if about to fall | Synonyms: reeler, staggerer |
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