| acceptor | (noun) the person (or institution) who accepts a check or draft and becomes responsible for paying the party named in the draft when it matures | - |
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| (noun) (chemistry) in the formation of a coordinate bond it is the compound to which electrons are donated | - |
| adaptor | (noun) device that enables something to be used in a way different from that for which it was intended or makes different pieces of apparatus compatible | Synonyms: adapter |
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| alcapton | (noun) an acid formed as an intermediate product of the metabolism of tyrosine and phenylalanine | Synonyms: alkapton, homogentisic acid |
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| alcaptonuria | (noun) a rare recessive metabolic anomaly marked by ochronosis and the presence of alkapton in the urine | Synonyms: alkaptonuria |
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| alkapton | (noun) an acid formed as an intermediate product of the metabolism of tyrosine and phenylalanine | Synonyms: alcapton, homogentisic acid |
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| alkaptonuria | (noun) a rare recessive metabolic anomaly marked by ochronosis and the presence of alkapton in the urine | Synonyms: alcaptonuria |
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| amboceptor | (noun) an immune body formed in the blood during infection or immunization that serves to link the complement to the antigen. | - |
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| antilepton | (noun) the antiparticle of a lepton | - |
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| apoptosis | (noun) a type of cell death in which the cell uses specialized cellular machinery to kill itself; a cell suicide mechanism that enables metazoans to control cell number and eliminate cells that threaten the animal's survival | Synonyms: caspase-mediated cell death, programmed cell death |
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| asymptomatic | (adjective) having no symptoms of illness or disease | Synonyms: symptomless |
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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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| asymptotic | (adjective) relating to or of the nature of an asymptote | - |
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| asymptotically | (adverb) toward an asymptote | - |
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| baroreceptor | (noun) a sensory receptor that responds to pressure | - |
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| captopril | (noun) a drug (trade name Capoten) that blocks the formation of angiotensin in the kidneys resulting in vasodilation; used in the treatment of hypertension and congestive heart failure | Synonyms: Capoten |
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| captor | (noun) a person who captures and holds people or animals | Synonyms: capturer |
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| chemoreceptor | (noun) a sensory receptor that responds to chemical stimuli | - |
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| cryptobiosis | (noun) a state in which an animal's metabolic activities come to a reversible standstill | - |
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| cryptobiotic | (adjective) of or related to the state of cryptobiosis | - |
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| cryptococcosis | (noun) a fungal infection characterized by nodular lesions--first in the lungs and spreading to the nervous system | - |
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| cryptocoryne | (noun) any plant of the genus Cryptocoryne; evergreen perennials growing in fresh or brackish water; tropical Asia | Synonyms: water trumpet |
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| cryptocurrency | (noun) a currency based on the usage of cryptography to secure transactions | - |
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| cryptogam | (noun) formerly recognized taxonomic group including all flowerless and seedless plants that reproduce by means of spores: ferns, mosses, algae, fungi | - |
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| cryptogamic | (adjective) of or relating to a cryptogam | Synonyms: cryptogamous |
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| cryptogamous | (adjective) of or relating to a cryptogam | Synonyms: cryptogamic |
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| cryptogram | (noun) a piece of writing in code or cipher | Synonyms: cryptograph, secret writing |
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| cryptograph | (noun) a device for deciphering codes and ciphers | - |
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| (noun) a piece of writing in code or cipher | Synonyms: cryptogram, secret writing |
| (noun) a secret method of writing | Synonyms: cipher, cypher, secret code |
| cryptographer | (noun) decoder skilled in the analysis of codes and cryptograms | Synonyms: cryptanalyst, cryptologist |
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| cryptographic | (adjective) of or relating to cryptanalysis | Synonyms: cryptanalytic, cryptographical, cryptologic, cryptological |
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| cryptographical | (adjective) of or relating to cryptanalysis | Synonyms: cryptanalytic, cryptographic, cryptologic, cryptological |
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| cryptographically | (adverb) in a cryptographic manner | - |
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| cryptography | (noun) act of writing in code or cipher | Synonyms: coding, secret writing, steganography |
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| (noun) the science of analyzing and deciphering codes and ciphers and cryptograms | Synonyms: cryptanalysis, cryptanalytics, cryptology |
| cryptologic | (adjective) of or relating to cryptanalysis | Synonyms: cryptanalytic, cryptographic, cryptographical, cryptological |
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| cryptological | (adjective) of or relating to cryptanalysis | Synonyms: cryptanalytic, cryptographic, cryptographical, cryptologic |
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| cryptologist | (noun) decoder skilled in the analysis of codes and cryptograms | Synonyms: cryptanalyst, cryptographer |
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| cryptology | (noun) the science of analyzing and deciphering codes and ciphers and cryptograms | Synonyms: cryptanalysis, cryptanalytics, cryptography |
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| cryptomonad | (noun) common in fresh and salt water appearing along the shore as algal blooms | Synonyms: cryptophyte |
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| cryptophyte | (noun) common in fresh and salt water appearing along the shore as algal blooms | Synonyms: cryptomonad |
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| cryptorchidism | (noun) failure of one or both testes to move into the scrotum as the male fetus develops | Synonyms: cryptorchidy, cryptorchism |
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| cryptorchidy | (noun) failure of one or both testes to move into the scrotum as the male fetus develops | Synonyms: cryptorchidism, cryptorchism |
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| cryptorchism | (noun) failure of one or both testes to move into the scrotum as the male fetus develops | Synonyms: cryptorchidism, cryptorchidy |
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| descriptor | (noun) a piece of stored information that is used to identify an item in an information storage and retrieval system | - |
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| (noun) the phonological or orthographic sound or appearance of a word that can be used to describe or identify something | Synonyms: form, signifier, word form |
| dicamptodon | (noun) salamanders found near cold streams throughout the year | Synonyms: dicamptodontid |
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| dicamptodontid | (noun) salamanders found near cold streams throughout the year | Synonyms: dicamptodon |
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| dihydrostreptomycin | (noun) antibiotic consisting of a hydrogenated form of streptomycin; used against tuberculosis and tularemia and Gram-negative organisms | - |
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| emptor | (noun) a person who buys | Synonyms: buyer, purchaser, vendee |
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| enteroceptor | (noun) any receptor that responds to stimuli inside the body | Synonyms: interoceptor |
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| enteroptosis | (noun) an abnormally downward position of the intestines in the abdominal cavity | - |
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| eoraptor | (noun) a theropod dinosaur of the genus Eoraptor | - |
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| exteroceptor | (noun) any receptor that responds to stimuli outside the body | - |
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| glossoptosis | (noun) abnormal downward or back placement of the tongue | - |
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| glyptography | (noun) carving or engraving (especially on stones) | - |
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| (noun) carvings or engravings (especially on precious stones) | Synonyms: glyptic art |
| haptoglobin | (noun) a protein in plasma that binds free hemoglobin and removes it (as from wounds) | - |
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| heptose | (noun) a monosaccharide with seven carbon atoms. | - |
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| interceptor | (noun) a fast maneuverable fighter plane designed to intercept enemy aircraft | - |
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| interoceptor | (noun) any receptor that responds to stimuli inside the body | Synonyms: enteroceptor |
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| ketoheptose | (noun) A seven-carbon sugar possessing a ketone group. | - |
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| kleptomania | (noun) an irresistible impulse to steal in the absence of any economic motive | - |
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| kleptomaniac | (noun) someone with an irrational urge to steal in the absence of an economic motive | - |
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| krypton | (noun) a colorless element that is one of the six inert gasses; occurs in trace amounts in air | Synonyms: atomic number 36, Kr |
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| laptop | (noun) a portable computer small enough to use in your lap | Synonyms: laptop computer |
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| leptocephalus | (noun) slender transparent larva of eels and certain fishes | - |
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| leptodactylid | (noun) toothed frogs: terrestrial or aquatic or arboreal | Synonyms: leptodactylid frog |
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| leptomeninges | (noun) the two innermost layers of the meninges; cerebrospinal fluid circulates between these innermost layers | - |
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| leptomeningitis | (noun) inflammation of the leptomeninges | - |
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| lepton | (noun) an elementary particle that participates in weak interactions; has a baryon number of 0 | - |
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| (noun) 100 lepta equal 1 drachma in Greece | - |
| leptorhine | (adjective) having a long narrow nose | Synonyms: leptorrhine, leptorrhinian, leptorrhinic |
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| leptorrhine | (adjective) having a long narrow nose | Synonyms: leptorhine, leptorrhinian, leptorrhinic |
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| leptorrhinian | (adjective) having a long narrow nose | Synonyms: leptorhine, leptorrhine, leptorrhinic |
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| leptorrhinic | (adjective) having a long narrow nose | Synonyms: leptorhine, leptorrhine, leptorrhinian |
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| leptospira | (noun) important pathogens causing Weil's disease or canicola fever | - |
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| leptospirosis | (noun) an infectious disease cause by leptospira and transmitted to humans from domestic animals; characterized by jaundice and fever | Synonyms: swamp fever |
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| leptosporangiate | (adjective) (of ferns) having each sporangium formed from a single epidermal cell | - |
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| leptosporangium | (noun) a sporangium formed from a single epidermal cell; characteristic of the Filicales or of almost all modern ferns | - |
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| leptotene | (noun) the first stage of the prophase of meiosis | - |
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| maniraptor | (noun) advanced carnivorous theropod; regarded as surviving today as living birds | - |
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| mercaptopurine | (noun) a drug (trade name Purinethol) that interferes with the metabolism of purine and is used to treat acute lymphocytic leukemia | Synonyms: Purinethol |
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| metroptosis | (noun) prolapse of the uterus | Synonyms: descensus uteri |
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| nephroptosia | (noun) prolapse of the kidney | Synonyms: nephroptosis |
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| nephroptosis | (noun) prolapse of the kidney | Synonyms: nephroptosia |
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| optometrist | (noun) a person skilled in testing for defects of vision in order to prescribe corrective glasses | Synonyms: oculist |
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| optometry | (noun) the practice of an optometrist | - |
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| osmoreceptor | (noun) sensory end organ that responds to changes in osmotic pressure | - |
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| oviraptorid | (noun) advanced carnivorous theropods, characterized by their toothless, parrot-like beaks and, in several cases, elaborate crests | - |
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| peptone | (noun) any of various water-soluble compounds that form by hydrolysis in the digestion of proteins to amino acids | - |
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| peremptorily | (adverb) in an imperative and commanding manner | Synonyms: imperatively |
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| peremptory | (adjective) putting an end to all debate or action | - |
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| (adjective) offensively self-assured or given to exercising usually unwarranted power | Synonyms: autocratic, bossy, dominating, high-and-mighty, magisterial |
| (adjective) not allowing contradiction or refusal | - |
| polyptoton | (noun) repetition of a word in a different case or inflection in the same sentence | - |
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| preceptor | (noun) teacher at a university or college (especially at Cambridge or Oxford) | Synonyms: don |
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| preceptorship | (noun) the position of preceptor | - |
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| preemptor | (noun) a bidder in bridge who makes a preemptive bid | Synonyms: pre-emptor |
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| (noun) someone who acquires land by preemption | Synonyms: pre-emptor |
| presymptomatic | (adjective) of or relating to the early phases of a disease when accurate diagnosis is not possible because symptoms of the disease have not yet appeared | Synonyms: preclinical |
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| proprioceptor | (noun) special nerve endings in the muscles and tendons and other organs that respond to stimuli regarding the position and movement of the body | - |
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| ptomain | (noun) any of various amines (such as putrescine or cadaverine) formed by the action of putrefactive bacteria | Synonyms: ptomaine |
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| ptomaine | (noun) a term for food poisoning that is no longer in scientific use; food poisoning was once thought to be caused by ingesting ptomaines | Synonyms: ptomaine poisoning |
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| (noun) any of various amines (such as putrescine or cadaverine) formed by the action of putrefactive bacteria | Synonyms: ptomain |
| ptosis | (noun) drooping of the upper eyelid caused by muscle paralysis and weakness | - |
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| raptor | (noun) any of numerous carnivorous birds that hunt and kill other animals | Synonyms: bird of prey, raptorial bird |
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| raptorial | (adjective) relating to or characteristic of birds of prey | - |
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| (adjective) living by preying on other animals especially by catching living prey | Synonyms: predatory, rapacious, ravening, vulturine, vulturous |
| receptor | (noun) an organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulation | Synonyms: sense organ, sensory receptor |
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| (noun) a cellular structure that is postulated to exist in order to mediate between a chemical agent that acts on nervous tissue and the physiological response | - |
| redemptory | (adjective) of or relating to or resulting in redemption | Synonyms: redemptional, redemptive |
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