| ananas | (noun) large sweet fleshy tropical fruit with a terminal tuft of stiff leaves; widely cultivated | Synonyms: pineapple |
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| anasarca | (noun) generalized edema with accumulation of serum in subcutaneous connective tissue | - |
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| anasarcous | (adjective) characterized by or affected by dropsy | - |
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| anaspid | (noun) extinct small freshwater jawless fish usually having a heterocercal tail and an armored head; of the Silurian and Devonian | - |
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| anastalsis | (noun) muscular action of the alimentary tract in a direction opposite to peristalsis | - |
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| anastigmat | (noun) compound lens or lens system designed to be free of astigmatism and able to form approximately point images | - |
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| anastigmatic | (adjective) not astigmatic | Synonyms: stigmatic |
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| (adjective) pertaining to a lens or lens system free of astigmatism (able to form point images) | Synonyms: stigmatic |
| anastomose | (verb) cause to join or open into each other by anastomosis | Synonyms: inosculate |
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| (verb) come together or open into each other | Synonyms: inosculate |
| anastomosis | (noun) a natural or surgical joining of parts or branches of tubular structures so as to make or become continuous | Synonyms: inosculation |
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| anastomotic | (adjective) of or relating to or exhibiting anastomosis | - |
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| anastrophe | (noun) the reversal of the normal order of words | Synonyms: inversion |
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| anastylosis | (noun) the archeological reassembly of ruined monuments from fallen or decayed fragments (incorporating new materials when necessary) | - |
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| asparaginase | (noun) antineoplastic drug (trade name Elspar) sometimes used to treat lymphoblastic leukemia | Synonyms: Elspar |
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| bastnasite | (noun) a yellow-to-brown mineral that is a source of rare earth elements | Synonyms: bastnaesite |
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| canasta | (noun) a form of rummy using two decks of cards and four jokers; jokers and deuces are wild; the object is to form groups of the same rank | Synonyms: basket rummy, meld |
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| carnassial | (adjective) (of a tooth) adapted for shearing flesh | - |
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| collagenase | (noun) any enzyme that catalyzes the hydrolysis of collagen and gelatin | - |
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| cyclooxygenase | (noun) either of two related enzymes that control the production of prostaglandins and are blocked by aspirin | Synonyms: Cox |
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| dynast | (noun) a hereditary ruler | - |
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| dynastic | (adjective) of or relating to or characteristic of a dynasty | - |
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| dynasty | (noun) a sequence of powerful leaders in the same family | - |
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| enterokinase | (noun) enzyme in the intestinal juice that converts inactive trypsinogen into active trypsin | - |
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| euthanasia | (noun) the act of killing someone painlessly (especially someone suffering from an incurable illness) | Synonyms: mercy killing |
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| fibrinase | (noun) in the clotting of blood thrombin catalyzes factor XIII into its active form (fibrinase) which causes fibrin to form a stable clot | Synonyms: factor XIII |
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| gnash | (verb) grind together, of teeth | - |
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| gymnasium | (noun) athletic facility equipped for sports or physical training | Synonyms: gym |
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| gymnast | (noun) an athlete who is skilled in gymnastics | - |
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| gymnastic | (adjective) of or relating to or used in exercises intended to develop strength and agility | - |
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| (adjective) vigorously active | Synonyms: acrobatic, athletic |
| gymnastics | (noun) a sport that involves exercises intended to display strength and balance and agility | Synonyms: gymnastic exercise |
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| histaminase | (noun) enzyme that acts as a catalyst in converting histidine to histamine | - |
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| kinase | (noun) an enzyme that catalyzes the conversion of a proenzyme to an active enzyme | - |
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| monas | (noun) a singular metaphysical entity from which material properties are said to derive | Synonyms: monad |
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| monastery | (noun) the residence of a religious community | - |
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| monastic | (adjective) of communal life sequestered from the world under religious vows | Synonyms: cloistered, cloistral, conventual, monastical |
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| (noun) a male religious living in a cloister and devoting himself to contemplation and prayer and work | Synonyms: monk |
| monastical | (adjective) of communal life sequestered from the world under religious vows | Synonyms: cloistered, cloistral, conventual, monastic |
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| monasticism | (noun) asceticism as a form of religious life; usually conducted in a community under a common rule and characterized by celibacy and poverty and obedience | - |
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| nasal | (adjective) of or in or relating to the nose | Synonyms: rhinal |
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| (adjective) sounding as if the nose were pinched | Synonyms: adenoidal, pinched |
| (noun) an elongated rectangular bone that forms the bridge of the nose | Synonyms: nasal bone, os nasale |
| (noun) a consonant produced through the nose with the mouth closed | Synonyms: nasal consonant |
| nasale | (verb) speak in a nasal voice | - |
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| nasalisation | (noun) the act of nasalizing; the utterance of sounds modulated by the nasal resonators | Synonyms: nasalization |
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| nasalise | (verb) pronounce with a lowered velum | Synonyms: nasalize |
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| (verb) speak nasally or through the nose | Synonyms: nasalize |
| nasality | (noun) a quality of the voice that is produced by nasal resonators | - |
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| nasalization | (noun) the act of nasalizing; the utterance of sounds modulated by the nasal resonators | Synonyms: nasalisation |
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| nasalize | (verb) pronounce with a lowered velum | Synonyms: nasalise |
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| (verb) speak nasally or through the nose | Synonyms: nasalise |
| nasally | (adverb) in a nasal manner | - |
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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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| nascent | (adjective) being born or beginning | - |
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| nasion | (noun) the craniometric point at the bridge of the nose where the frontal and nasal bones of the skull meet | - |
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| nasopharyngeal | (adjective) of or relating to or located near the nasopharynx | - |
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| nasopharynx | (noun) cavity forming the upper part of the pharynx | - |
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| nastika | (noun) Technical term in Hinduism used to classify philosophical schools and persons that do not accept the authority of the Vedas as supreme revealed scriptures. | - |
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| nastily | (adverb) in a nasty ill-tempered manner | Synonyms: meanly |
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| nastiness | (noun) the quality of being highly unpleasant | - |
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| (noun) malevolence by virtue of being malicious or spiteful or nasty | Synonyms: bitchiness, cattiness, spite, spitefulness |
| (noun) a state characterized by foul or disgusting dirt and refuse | Synonyms: filth, filthiness, foulness |
| nasturtium | (noun) flowers and seeds and leaves all used as flavorings | - |
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| (noun) any tropical American plant of the genus Tropaeolum having pungent juice and long-spurred yellow to red flowers | - |
| nasty | (adjective) offensive or even (of persons) malicious | Synonyms: awful |
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| (adjective) exasperatingly difficult to handle or circumvent | Synonyms: tight |
| (adjective) disgustingly dirty; filled or smeared with offensive matter | Synonyms: filthy, foul |
| (adjective) characterized by obscenity | Synonyms: cruddy, filthy, foul, smutty |
| nitrogenase | (noun) an enzyme of nitrogen-fixing microorganisms that catalyzes the conversion of nitrogen to ammonia | - |
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| nonassertive | (adjective) not aggressively self-assured, though not necessarily lacking in confidence | - |
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| nonassociative | (adjective) not associative | - |
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| nonastringent | (adjective) not astringent | - |
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| orinasal | (noun) a speech sound produced with both the oral and nasal passages open (as French nasal vowels) | Synonyms: orinasal phone |
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| oxygenase | (noun) an oxidoreductase that catalyzes the incorporation of molecular oxygen | - |
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| paranasal | (adjective) adjacent to the nasal cavities | - |
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| parnassia | (noun) any of various usually evergreen bog plants of the genus Parnassia having broad smooth basal leaves and a single pale flower resembling a buttercup | Synonyms: grass-of-Parnassus |
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| penicillinase | (noun) enzyme produced by certain bacteria that inactivates penicillin and results in resistance to that antibiotic | Synonyms: beta-lactamase |
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| perinasal | (adjective) near the nose | Synonyms: perirhinal |
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| pleonasm | (noun) using more words than necessary | - |
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| pleonaste | (noun) a dark-colored spinel containing iron | Synonyms: ceylonite |
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| pleonastic | (adjective) repetition of same and identical sense with different and non-identical words | Synonyms: redundant, tautologic, tautological |
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| proteinase | (noun) any enzyme that catalyzes the splitting of proteins into smaller peptide fractions and amino acids by a process known as proteolysis | Synonyms: peptidase, protease, proteolytic enzyme |
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| prothrombinase | (noun) coagulation factor that is converted to an enzyme that converts prothrombin to thrombin in a reaction that depends on calcium ions and other coagulation factors | Synonyms: factor X |
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| pyocyanase | (noun) a yellow-green mixture of antibiotics obtained from the bacillus of green pus | - |
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| renascence | (noun) a second or new birth | Synonyms: rebirth, reincarnation |
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| renascent | (adjective) rising again as to new life and vigor | Synonyms: resurgent |
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| ribonucleinase | (noun) a transferase that catalyzes the hydrolysis of ribonucleic acid | Synonyms: ribonuclease, RNase |
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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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| thrombokinase | (noun) an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot | Synonyms: factor III, thromboplastin |
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| transaminase | (noun) a class of transferases that catalyze transamination (that transfer an amino group from an amino acid to another compound) | Synonyms: aminopherase, aminotransferase |
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| unascertainable | (adjective) not able to be ascertained; resisting discovery | Synonyms: undiscoverable |
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| unascribable | (adjective) not attributable | Synonyms: unattributable |
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| unashamed | (adjective) used of persons or their behavior; feeling no shame | - |
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| unashamedly | (adverb) without shame | Synonyms: barefacedly, shamelessly |
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| unasked | (adjective) uninvited | - |
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| unassailable | (adjective) without flaws or loopholes | Synonyms: bulletproof, ironclad, unshakable, watertight |
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| (adjective) impossible to assail | Synonyms: untouchable |
| (adjective) immune to attack; incapable of being tampered with | Synonyms: impregnable, inviolable, secure, strong, unattackable |
| unassailably | (adverb) in an unalterable and unchangeable manner | Synonyms: immutably, unalterably, unchangeably |
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| unassertive | (adjective) inclined to timidity or lack of self-confidence | - |
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| unassertively | (adverb) in an unassertive manner | - |
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| unassertiveness | (noun) diffidence about self promotion | - |
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| unassignable | (adjective) incapable of being transferred | Synonyms: nontransferable, untransferable |
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| unassigned | (adjective) not assigned | - |
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| unassisted | (adjective) lacking help | - |
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| (adjective) unsupported by other people | Synonyms: single-handed, unbacked |
| unassuming | (adjective) not arrogant or presuming | Synonyms: retiring |
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| unassumingly | (adverb) in an unassuming manner | - |
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| unassumingness | (noun) a quality of naturalness and simplicity | Synonyms: sincerity |
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| unassured | (adjective) lacking boldness or confidence | - |
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| unasterisked | (adjective) not marked with an asterisk | Synonyms: unstarred |
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| urokinase | (noun) protease produced in the kidney that converts plasminogen to plasmin and so initiates fibrinolysis | Synonyms: plasminogen activator |
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