| abdicable | (adjective) capable of being discarded or renounced or relinquished | - |
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| abdicate | (verb) give up, such as power, as of monarchs and emperors, or duties and obligations | Synonyms: renounce |
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| abdication | (noun) a formal resignation and renunciation of powers | Synonyms: stepping down |
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| (noun) the act of abdicating | Synonyms: stepping down |
| abdicator | (noun) one who formally relinquishes an office or responsibility | - |
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| acidic | (adjective) being or containing an acid; of a solution having an excess of hydrogen atoms (having a pH of less than 7) | - |
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| (adjective) being sour to the taste | Synonyms: acid, acidulent, acidulous |
| addict | (noun) someone who is physiologically dependent on a substance or activity | - |
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| (noun) someone who is so ardently devoted to something that it resembles an addiction | Synonyms: freak, junkie, junky, nut |
| (verb) to cause (someone or oneself) to become dependent (on something, especially a narcotic drug) | Synonyms: hook |
| addicted | (adjective) compulsively or physiologically dependent on something habit-forming | - |
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| addiction | (noun) (Roman law) a formal award by a magistrate of a thing or person to another person (as the award of a debtor to his creditor); a surrender to a master | - |
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| (noun) an abnormally strong craving | - |
| (noun) being abnormally tolerant to and dependent on something that is psychologically or physically habit-forming (especially alcohol or narcotic drugs) | Synonyms: dependance, dependence, dependency, habituation |
| addictive | (adjective) causing or characterized by addiction | Synonyms: habit-forming |
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| adjudicate | (verb) bring to an end; settle conclusively | Synonyms: decide, resolve, settle |
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| (verb) put on trial or hear a case and sit as the judge at the trial of | Synonyms: judge, try |
| adjudication | (noun) the final judgment in a legal proceeding; the act of pronouncing judgment based on the evidence presented | - |
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| adjudicative | (adjective) concerned with adjudicating | Synonyms: adjudicatory |
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| adjudicator | (noun) a person who studies and settles conflicts and disputes | - |
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| adjudicatory | (adjective) concerned with adjudicating | Synonyms: adjudicative |
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| aeromedical | (adjective) of or relating to aviation medicine | - |
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| aeromedicine | (noun) the study and treatment of disorders associated with flight (especially with space flight) | Synonyms: aerospace medicine, aviation medicine |
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| aldehydic | (adjective) of or related to or containing aldehydes | - |
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| anodic | (adjective) of or at or relating to an anode | Synonyms: anodal |
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| antispasmodic | (noun) a drug used to relieve or prevent spasms (especially of the smooth muscles) | Synonyms: antispasmodic agent, spasmolytic |
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| aperiodic | (adjective) not recurring at regular intervals | Synonyms: nonperiodic |
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| apodictic | (adjective) of a proposition; necessarily true or logically certain | Synonyms: apodeictic |
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| appendicectomy | (noun) surgical removal of the vermiform appendix | Synonyms: appendectomy |
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| appendicitis | (noun) inflammation of the vermiform appendix | - |
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| appendicle | (noun) a small appendage | - |
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| appendicular | (adjective) relating to or consisting of an appendage or appendages; especially the limbs | - |
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| appendicularia | (noun) free-swimming tadpole-shaped pelagic tunicate resembling larvae of other tunicates | - |
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| asdic | (noun) a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return | Synonyms: echo sounder, sonar |
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| bandicoot | (noun) any of various agile ratlike terrestrial marsupials of Australia and adjacent islands; insectivorous and herbivorous | - |
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| bardic | (adjective) being a bard or relating to a bard's poetry | - |
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| benedick | (noun) a newly married man (especially one who has long been a bachelor) | Synonyms: benedict |
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| benedict | (noun) a newly married man (especially one who has long been a bachelor) | Synonyms: benedick |
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| benedictine | (noun) a French liqueur originally made by Benedictine monks | - |
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| benediction | (noun) the act of praying for divine protection | Synonyms: blessing |
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| (noun) a ceremonial prayer invoking divine protection | Synonyms: blessing |
| benedictive | (adjective) expressing benediction | Synonyms: benedictory |
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| benedictory | (adjective) expressing benediction | Synonyms: benedictive |
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| biomedical | (adjective) relating to the activities and applications of science to clinical medicine | - |
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| biomedicine | (noun) the branch of medical science that studies the ability of organisms to withstand environmental stress (as in space travel) | - |
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| (noun) the branch of medical science that applies biological and physiological principles to clinical practice | - |
| bodice | (noun) part of a dress above the waist | - |
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| bromidic | (adjective) given to uttering bromides | - |
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| (adjective) dull and tiresome but with pretensions of significance or originality | Synonyms: corny, platitudinal, platitudinous |
| cathodic | (adjective) of or at or pertaining to a cathode | - |
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| claudication | (noun) disability of walking due to crippling of the legs or feet | Synonyms: gameness, gimp, gimpiness, lameness, limping |
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| codicil | (noun) a supplement to a will; a testamentary instrument intended to alter an already executed will | - |
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| contradict | (verb) prove negative; show to be false | Synonyms: negate |
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| (verb) deny the truth of | Synonyms: contravene, negate |
| (verb) be resistant to | Synonyms: controvert, oppose |
| (verb) be in contradiction with | Synonyms: belie, negate |
| contradiction | (noun) the speech act of contradicting someone | - |
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| (noun) (logic) a statement that is necessarily false | Synonyms: contradiction in terms |
| (noun) opposition between two conflicting forces or ideas | - |
| contradictorily | (adverb) in a contradictory manner | - |
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| contradictoriness | (noun) the relation that exists when opposites cannot coexist | - |
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| contradictory | (adjective) of words or propositions so related that both cannot be true and both cannot be false | - |
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| (adjective) unable for both to exist or be true at the same time | Synonyms: mutually exclusive |
| (adjective) in disagreement | Synonyms: at odds, conflicting, self-contradictory |
| (adjective) that confounds or contradicts or confuses | Synonyms: confounding |
| (noun) two propositions are contradictories if both cannot be true (or both cannot be false) at the same time | - |
| contraindicate | (verb) make a treatment inadvisable | - |
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| contraindication | (noun) (medicine) a reason that makes it inadvisable to prescribe a particular drug or employ a particular procedure or treatment | - |
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| cowardice | (noun) the trait of lacking courage | Synonyms: cowardliness |
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| dedicate | (verb) set apart to sacred uses with solemn rites, of a church | - |
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| (verb) give entirely to a specific person, activity, or cause | Synonyms: commit, consecrate, devote, give |
| (verb) inscribe or address by way of compliment | - |
| (verb) open to public use, as of a highway, park, or building | - |
| dedicated | (adjective) devoted to a cause or ideal or purpose | - |
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| (adjective) solemnly dedicated to or set apart for a high or sacred purpose | Synonyms: consecrate, consecrated |
| dedication | (noun) the act of binding yourself (intellectually or emotionally) to a course of action | Synonyms: allegiance, commitment, loyalty |
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| (noun) complete and wholehearted fidelity | - |
| (noun) a short message (as in a book or musical work or on a photograph) dedicating it to someone or something | Synonyms: inscription |
| (noun) a message that makes a pledge | Synonyms: commitment |
| (noun) a ceremony in which something (as a building) is dedicated to some goal or purpose | - |
| 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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| dicarboxylic | (adjective) containing two carboxyls per molecule | - |
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| dice | (noun) a small cube with 1 to 6 spots on the six faces; used in gambling to generate random numbers | Synonyms: die |
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| (verb) play dice | - |
| (verb) cut into cubes | Synonyms: cube |
| dicer | (noun) a mechanical device used for dicing food | - |
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| dicey | (adjective) of uncertain outcome; especially fraught with risk | Synonyms: chanceful, chancy, dodgy |
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| dichloride | (noun) a compound containing two chlorine atoms per molecule | Synonyms: bichloride |
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| dichlorodiphenyltrichloroethane | (noun) an insecticide that is also toxic to animals and humans; banned in the United States since 1972 | Synonyms: DDT |
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| dichloromethane | (noun) a nonflammable liquid used as a solvent and paint remover and refrigerant | Synonyms: methylene chloride |
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| dichondra | (noun) a creeping perennial herb with hairy stems and orbicular to reniform leaves and small white to greenish flowers; used as a grass substitute in warm regions | Synonyms: Dichondra micrantha |
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| dichotomisation | (noun) the act of dividing into two sharply different categories | Synonyms: dichotomization |
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| dichotomise | (verb) divide into two opposing groups or kinds | Synonyms: dichotomize |
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| dichotomization | (noun) the act of dividing into two sharply different categories | Synonyms: dichotomisation |
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| dichotomize | (verb) divide into two opposing groups or kinds | Synonyms: dichotomise |
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| dichotomous | (adjective) divided or dividing into two sharply distinguished parts or classifications | - |
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| dichotomously | (adverb) in a dichotomous manner | - |
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| dichotomy | (noun) being twofold; a classification into two opposed parts or subclasses | Synonyms: duality |
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| dichroism | (noun) pleochroism of a crystal so that it exhibits two different colors when viewed from two different directions | - |
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| dichromacy | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromasy, dichromatism, dichromatopsia, dichromia |
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| dichromasy | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromacy, dichromatism, dichromatopsia, dichromia |
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| dichromat | (noun) a person with any of the various forms of dichromacy | - |
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| dichromate | (noun) a salt of the hypothetical dichromic acid | Synonyms: bichromate |
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| dichromatic | (adjective) of or relating to dichromatism | - |
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| (adjective) having two colors | Synonyms: bichrome, bicolor, bicolored, bicolour, bicoloured |
| dichromatism | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromacy, dichromasy, dichromatopsia, dichromia |
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| dichromatopsia | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromacy, dichromasy, dichromatism, dichromia |
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| dichromia | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromacy, dichromasy, dichromatism, dichromatopsia |
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| dick | (noun) obscene terms for penis | Synonyms: cock, pecker, prick, putz, shaft, tool |
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| (noun) someone who is a detective | Synonyms: gumshoe, hawkshaw |
| dickens | (noun) a word used in exclamations of confusion | Synonyms: deuce, devil |
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| dicker | (verb) negotiate the terms of an exchange | Synonyms: bargain |
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| dickey | (adjective) (British informal) faulty | Synonyms: dicky |
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| (noun) a man's detachable insert (usually starched) to simulate the front of a shirt | Synonyms: dickie, dicky, shirtfront |
| (noun) a small third seat in the back of an old-fashioned two-seater | Synonyms: dickey-seat, dickie-seat, dickie, dicky-seat, dicky |
| dickeybird | (noun) small bird; adults talking to children sometimes use these words to refer to small birds | Synonyms: dickey-bird, dicky-bird, dickybird |
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| dickhead | (noun) insulting terms of address for people who are stupid or irritating or ridiculous | Synonyms: asshole, bastard, cocksucker, mother fucker, motherfucker, prick, shit, SOB, son of a bitch, whoreson |
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| dickie | (noun) a man's detachable insert (usually starched) to simulate the front of a shirt | Synonyms: dickey, dicky, shirtfront |
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| (noun) a small third seat in the back of an old-fashioned two-seater | Synonyms: dickey-seat, dickey, dickie-seat, dicky-seat, dicky |
| dicky | (adjective) (British informal) faulty | Synonyms: dickey |
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| (noun) a man's detachable insert (usually starched) to simulate the front of a shirt | Synonyms: dickey, dickie, shirtfront |
| (noun) a small third seat in the back of an old-fashioned two-seater | Synonyms: dickey-seat, dickey, dickie-seat, dickie, dicky-seat |
| dickybird | (noun) small bird; adults talking to children sometimes use these words to refer to small birds | Synonyms: dickey-bird, dickeybird, dicky-bird |
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| diclinous | (adjective) having pistils and stamens in separate flowers | - |
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| dicloxacillin | (noun) antibacterial (trade name Dynapen) used to treat staphylococcal infections that are resistant to penicillin | Synonyms: Dynapen |
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| dicot | (noun) flowering plant with two cotyledons; the stem grows by deposit on its outside | Synonyms: dicotyledon, exogen, magnoliopsid |
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| dicotyledon | (noun) flowering plant with two cotyledons; the stem grows by deposit on its outside | Synonyms: dicot, exogen, magnoliopsid |
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| dicotyledonous | (adjective) (of a flowering plant) having two cotyledons in the seed | - |
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| dicoumarol | (noun) an anticoagulant drug that has now been largely replaced by warfarin | Synonyms: dicumarol |
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| dictate | (noun) a guiding principle | - |
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| (noun) an authoritative rule | - |
| (verb) say out loud for the purpose of recording | - |
| (verb) issue commands or orders for | Synonyms: order, prescribe |
| (verb) rule as a dictator | - |
| dictated | (adjective) determined or decided upon as by an authority | Synonyms: determined, set |
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| dictation | (noun) speech intended for reproduction in writing | - |
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| (noun) an authoritative direction or instruction to do something | Synonyms: bid, bidding, command |
| (noun) matter that has been dictated and transcribed; a dictated passage | - |
| dictator | (noun) a ruler who is unconstrained by law | Synonyms: potentate |
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| (noun) a person who behaves in a tyrannical manner | Synonyms: authoritarian |
| (noun) a speaker who dictates to a secretary or a recording machine | - |
| dictatorial | (adjective) of or characteristic of a dictator | - |
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| (adjective) expecting unquestioning obedience | Synonyms: authoritarian, overbearing |
| (adjective) characteristic of an absolute ruler or absolute rule; having absolute sovereignty | Synonyms: authoritarian, autocratic, despotic, tyrannic, tyrannical |
| dictatorially | (adverb) in an overbearingly domineering manner; as a dictator | Synonyms: autocratically, magisterially |
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