| actinian | (noun) any sea anemone or related animal | Synonyms: actinia, actiniarian |
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| actiniarian | (noun) any sea anemone or related animal | Synonyms: actinia, actinian |
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| actinide | (noun) any of a series of radioactive elements with atomic numbers 89 through 103 | Synonyms: actinoid, actinon |
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| actinism | (noun) the property of radiation that enables it to produce photochemical effects | - |
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| actinium | (noun) a radioactive element of the actinide series; found in uranium ores | Synonyms: Ac, atomic number 89 |
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| actinoid | (noun) any of a series of radioactive elements with atomic numbers 89 through 103 | Synonyms: actinide, actinon |
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| actinolite | (noun) a green mineral of the amphibole group; calcium magnesium iron silicate | - |
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| actinometer | (noun) an instrument for measuring the intensity of electromagnetic radiation (usually by the photochemical effect) | - |
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| actinometry | (noun) measuring the intensity of electromagnetic radiation (especially of the sun's rays) | - |
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| actinomyces | (noun) soil-inhabiting saprophytes and disease-producing plant and animal parasites | - |
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| actinomycete | (noun) any bacteria (some of which are pathogenic for humans and animals) belonging to the order Actinomycetales | - |
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| actinomycin | (noun) any of various red antibiotics isolated from soil bacteria | - |
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| actinomycosis | (noun) disease of cattle that can be transmitted to humans; results from infection with actinomycetes; characterized by hard swellings that exude pus through long sinuses | - |
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| actinomyxidian | (noun) of or relating to parasites of worms | - |
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| actinon | (noun) any of a series of radioactive elements with atomic numbers 89 through 103 | Synonyms: actinide, actinoid |
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| actinopod | (noun) protozoa having stiff rodlike radiating pseudopods | - |
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| actinotherapy | (noun) (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance | Synonyms: irradiation, radiation, radiation therapy, radiotherapy |
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| actinozoan | (noun) sessile marine coelenterates including solitary and colonial polyps; the medusoid phase is entirely suppressed | Synonyms: anthozoan |
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| action | (noun) the most important or interesting work or activity in a specific area or field | - |
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| (noun) a judicial proceeding brought by one party against another; one party prosecutes another for a wrong done or for protection of a right or for prevention of a wrong | Synonyms: action at law, legal action |
| (noun) something done (usually as opposed to something said) | - |
| (noun) a military engagement | Synonyms: military action |
| (noun) an act by a government body or supranational organization | - |
| (noun) the operating part that transmits power to a mechanism | Synonyms: action mechanism |
| (noun) In firearms terminology, the mechanism that handles the ammunition (loads, locks, fires, and extracts the cartridges). | - |
| (noun) the trait of being active and energetic and forceful | - |
| (noun) the series of events that form a plot | - |
| (noun) a process existing in or produced by nature (rather than by the intent of human beings) | Synonyms: activity, natural action, natural process |
| (noun) the state of being active | Synonyms: activeness, activity |
| activating | (noun) the activity of causing to have energy and be active | Synonyms: activation, energizing |
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| activation | (noun) the activity of causing to have energy and be active | Synonyms: activating, energizing |
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| (noun) making active and effective (as a bomb) | - |
| (noun) stimulation of activity in an organism or chemical | - |
| activeness | (noun) the trait of being active; moving or acting rapidly and energetically | Synonyms: activity |
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| (noun) the state of being active | Synonyms: action, activity |
| actomyosin | (noun) a protein complex in muscle fibers; composed of myosin and actin; shortens when stimulated and causes muscle contractions | - |
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| actualisation | (noun) making real or giving the appearance of reality | Synonyms: actualization, realisation, realization |
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| actualization | (noun) making real or giving the appearance of reality | Synonyms: actualisation, realisation, realization |
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| actuation | (noun) the act of propelling | Synonyms: propulsion |
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| acumen | (noun) shrewdness shown by keen insight | Synonyms: insightfulness |
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| (noun) a tapering point | - |
| acupuncture | (noun) treatment of pain or disease by inserting the tips of needles at specific points on the skin | Synonyms: stylostixis |
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| acuteness | (noun) the quality of having a sharp edge or point | - |
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| (noun) a quick and penetrating intelligence | Synonyms: acuity, keenness, sharpness |
| (noun) a sensitivity that is keen and highly developed | - |
| acylation | (noun) the process of introducing an acyl group into a compound | - |
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| adamance | (noun) resoluteness by virtue of being unyielding and inflexible | Synonyms: obduracy, unyieldingness |
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| adamant | (noun) very hard native crystalline carbon valued as a gem | Synonyms: diamond |
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| adaptation | (noun) (physiology) the responsive adjustment of a sense organ (as the eye) to varying conditions (as of light) | - |
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| (noun) a written work (as a novel) that has been recast in a new form | Synonyms: version |
| (noun) the process of adapting to something (such as environmental conditions) | Synonyms: adaption, adjustment |
| adaption | (noun) the process of adapting to something (such as environmental conditions) | Synonyms: adaptation, adjustment |
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| addend | (noun) a number that is added to another number (the augend) | - |
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| addendum | (noun) textual matter that is added onto a publication; usually at the end | Synonyms: postscript, supplement |
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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 |
| addition | (noun) the arithmetic operation of summing; calculating the sum of two or more numbers | Synonyms: plus, summation |
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| (noun) the act of adding one thing to another | - |
| (noun) a component that is added to something to improve it | Synonyms: add-on, improver |
| (noun) a suburban area laid out in streets and lots for a future residential area | - |
| (noun) something added to what you already have | Synonyms: accession |
| (noun) a quantity that is added | Synonyms: gain, increase |
| adducing | (noun) citing as evidence or proof | - |
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| adduction | (noun) (physiology) moving of a body part toward the central axis of the body | - |
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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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| adenocarcinoma | (noun) malignant tumor originating in glandular epithelium | Synonyms: glandular cancer, glandular carcinoma |
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| adenohypophysis | (noun) the anterior lobe of the pituitary body; primarily glandular in nature | Synonyms: anterior pituitary, anterior pituitary gland |
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| adenoid | (noun) a collection of lymphatic tissue in the throat behind the uvula (on the posterior wall and roof of the nasopharynx) | Synonyms: Luschka's tonsil, pharyngeal tonsil, third tonsil, tonsilla adenoidea, tonsilla pharyngealis |
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| adenoidectomy | (noun) surgical removal of the adenoids; commonly performed along with tonsillectomy | - |
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| adenoma | (noun) a benign epithelial tumor of glandular origin | - |
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| adenomegaly | (noun) gland enlargement | - |
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| adenomyosarcoma | (noun) malignant renal tumor of young children characterized by hypertension and blood in the urine and the presence of a palpable mass | Synonyms: embryoma of the kidney, nephroblastoma, Wilms' tumor, Wilms tumour |
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| adenomyosis | (noun) the presence of endometrium elsewhere than in the lining of the uterus; causes premenstrual pain and dysmenorrhea | Synonyms: endometriosis |
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| adenopathy | (noun) a glandular disease or enlargement of glandular tissue (especially of the lymph glands) | - |
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| adenosine | (noun) (biochemistry) a nucleoside that is a structural component of nucleic acids; it is present in all living cells in a combined form as a constituent of DNA and RNA and ADP and ATP and AMP | - |
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| adenosis | (noun) a disorder of the glands of the body | Synonyms: gland disease, glandular disease, glandular disorder |
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| adenovirus | (noun) any of a group of viruses including those that in humans cause upper respiratory infections or infectious pinkeye | - |
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| adeptness | (noun) skillful performance or ability without difficulty | Synonyms: adroitness, deftness, facility, quickness |
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| adequateness | (noun) the quality of being able to meet a need satisfactorily: | Synonyms: adequacy |
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| adermin | (noun) a B vitamin that is essential for metabolism of amino acids and starch | Synonyms: pyridoxal, pyridoxamine, pyridoxine, vitamin B6 |
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| adherence | (noun) faithful support for a cause or political party or religion | Synonyms: adhesion, attachment |
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| (noun) the property of sticking together (as of glue and wood) or the joining of surfaces of different composition | Synonyms: adhesion, adhesiveness, bond |
| adherent | (noun) someone who believes and helps to spread the doctrine of another | Synonyms: disciple |
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| adhesion | (noun) faithful support for a cause or political party or religion | Synonyms: adherence, attachment |
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| (noun) the property of sticking together (as of glue and wood) or the joining of surfaces of different composition | Synonyms: adherence, adhesiveness, bond |
| (noun) a fibrous band of scar tissue that binds together normally separate anatomical structures | - |
| (noun) abnormal union of bodily tissues; most common in the abdomen | - |
| adhesiveness | (noun) the property of sticking together (as of glue and wood) or the joining of surfaces of different composition | Synonyms: adherence, adhesion, bond |
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| adiaphoron | (noun) (Stoic philosophy) a matter having no moral merit or demerit. | - |
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| (noun) a religious ceremonial or ritual observance that is held to be an affair of the individual conscience because it is neither forbidden nor enjoined by the scriptures. | - |
| adience | (noun) (psychology) an urge to accept or approach a situation or an object | - |
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| adiposeness | (noun) having the property of containing fat | Synonyms: adiposity, fattiness |
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| adjacency | (noun) the attribute of being so near as to be touching | Synonyms: contiguity, contiguousness |
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| adjournment | (noun) the termination of a meeting | Synonyms: dissolution |
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| (noun) the act of postponing to another time or place | - |
| adjudication | (noun) the final judgment in a legal proceeding; the act of pronouncing judgment based on the evidence presented | - |
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| adjunct | (noun) a construction that can be used to extend the meaning of a word or phrase but is not one of the main constituents of a sentence | - |
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| (noun) something added to another thing but not an essential part of it | - |
| (noun) a person who is an assistant or subordinate to another | - |
| adjunction | (noun) an act of joining or adjoining things | Synonyms: junction |
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| adjuration | (noun) a solemn and earnest appeal to someone to do something | - |
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| adjustment | (noun) the act of making something different (as e.g. the size of a garment) | Synonyms: alteration, modification |
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| (noun) the act of adjusting something to match a standard | Synonyms: readjustment, registration |
| (noun) making or becoming suitable; adjusting to circumstances | Synonyms: accommodation, fitting |
| (noun) an amount added or deducted on the basis of qualifying circumstances | Synonyms: allowance |
| (noun) the process of adapting to something (such as environmental conditions) | Synonyms: adaptation, adaption |
| adjutant | (noun) large Indian stork with a military gait | Synonyms: adjutant bird, adjutant stork, Leptoptilus dubius |
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| (noun) an officer who acts as military assistant to a more senior officer | Synonyms: aide-de-camp, aide |
| adjuvant | (noun) an additive that enhances the effectiveness of medical treatment | - |
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| adman | (noun) someone whose business is advertising | Synonyms: advertiser, advertizer |
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| administration | (noun) a method of tending to or managing the affairs of some group of people (especially the group's business affairs) | Synonyms: disposal |
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| (noun) the act of administering medication | Synonyms: giving medication |
| (noun) the act of meting out justice according to the law | Synonyms: judicature |
| (noun) the act of governing; exercising authority | Synonyms: governance, governing, government, government activity |
| (noun) the persons (or committees or departments etc.) who make up a body for the purpose of administering something | Synonyms: brass, establishment, governance, governing body, organisation, organization |
| (noun) the tenure of a president | Synonyms: presidency, presidential term |
| administrator | (noun) someone who administers a business | Synonyms: decision maker |
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| (noun) the party appointed by a probate court to distribute the estate of someone who dies without a will or without naming an executor | - |
| (noun) someone who manages a government agency or department | Synonyms: executive |
| administrivia | (noun) the tiresome but essential details that must be taken care of and tasks that must be performed in running an organization | - |
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| admirableness | (noun) admirable excellence | Synonyms: admirability, wonderfulness |
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| admiration | (noun) a favorable judgment | Synonyms: appreciation |
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| (noun) a feeling of delighted approval and liking | Synonyms: esteem |
| (noun) the feeling aroused by something strange and surprising | Synonyms: wonder, wonderment |
| admission | (noun) the act of admitting someone to enter | Synonyms: admittance |
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| (noun) the right to enter | Synonyms: access, accession, admittance, entree |
| (noun) an acknowledgment of the truth of something | - |
| (noun) the fee charged for admission | Synonyms: admission charge, admission fee, admission price, entrance fee, entrance money, price of admission |
| admittance | (noun) the act of admitting someone to enter | Synonyms: admission |
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| (noun) the right to enter | Synonyms: access, accession, admission, entree |
| admonisher | (noun) someone who gives a warning so that a mistake can be avoided | Synonyms: monitor, reminder |
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| admonishment | (noun) a firm rebuke | Synonyms: admonition, monition |
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| admonition | (noun) a firm rebuke | Synonyms: admonishment, monition |
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| (noun) cautionary advice about something imminent (especially imminent danger or other unpleasantness) | Synonyms: monition, warning, word of advice |
| adnexa | (noun) accessory or adjoining anatomical parts or appendages to an organ (especially of the embryo) | Synonyms: annexa |
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| adnoun | (noun) an adjective used as a noun | - |
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| adolescence | (noun) in the state that someone is in between puberty and adulthood | - |
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| (noun) the time period between the beginning of puberty and adulthood | - |
| adolescent | (noun) a juvenile between the onset of puberty and maturity | Synonyms: stripling, teen, teenager |
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| adonis | (noun) any handsome young man | - |
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| adoption | (noun) the act of accepting with approval; favorable reception | Synonyms: acceptance, acceptation, espousal |
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| (noun) the appropriation (of ideas or words etc) from another source | Synonyms: borrowing |
| (noun) a legal proceeding that creates a parent-child relation between persons not related by blood; the adopted child is entitled to all privileges belonging to a natural child of the adoptive parents (including the right to inherit) | - |
| adorableness | (noun) extreme attractiveness | Synonyms: adorability |
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| adoration | (noun) the act of admiring strongly | Synonyms: idolisation, idolization |
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| (noun) the worship given to God alone | Synonyms: latria |
| (noun) a feeling of profound love and admiration | Synonyms: worship |
| adornment | (noun) the action of decorating yourself with something colorful and interesting | - |
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| (noun) a decoration of color or interest that is added to relieve plainness | - |
| adrenal | (noun) either of a pair of complex endocrine glands situated near the kidney | Synonyms: adrenal gland, suprarenal gland |
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| adrenalectomy | (noun) surgical removal of one or both adrenal glands | Synonyms: suprarenalectomy |
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| adrenaline | (noun) a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action | Synonyms: Adrenalin, epinephrin, epinephrine |
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| adrenarche | (noun) the increase in activity of the adrenal glands just before puberty | - |
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| adrenergic | (noun) drug that has the effects of epinephrine | Synonyms: adrenergic drug |
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| adrenocorticotrophin | (noun) a hormone produced by the anterior pituitary gland that stimulates the adrenal cortex | Synonyms: ACTH, adrenocorticotrophic hormone, adrenocorticotropic hormone, adrenocorticotropin, corticotrophin, corticotropin |
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| adrenocorticotropin | (noun) a hormone produced by the anterior pituitary gland that stimulates the adrenal cortex | Synonyms: ACTH, adrenocorticotrophic hormone, adrenocorticotrophin, adrenocorticotropic hormone, corticotrophin, corticotropin |
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