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- ABACSynonym of nomogram.
- ABACUSA table or tray scattered with sand which was used for calculating or drawing.
- ABBAFather; religious superior; in the Syriac, Coptic, and Ethiopic churches, a title given to the bishops, and by the bishops to the patriarch; a title given to Jewish scholars in the
- ABBOTThe superior or head of an abbey or monastery.
- ABIOTICNonliving, inanimate, characterised by the absence of life; of inorganic matter.
- ABNORMALNot conforming to rule or system; deviating from the usual or normal type.
- ABSINTHEThe herb absinthium Artemisia absinthium (grande wormwood); essence of wormwood.
- ABULIAAbsence of willpower or decisiveness, especially as a symptom of mental illness.
- ABYSMHell; the infernal pit; the great deep; the primal chaos.
- ACADEMEThe garden in Athens where the academics met.
- ACADEMYAn institution for the study of higher learning; a college or a university; typically a private school.
- ACALEPHA member of the former Acalephae group, now a part of the Cnidaria phylum.
- ACALEPHESA member of the former Acalephae group, now a part of the Cnidaria phylum.
- ACANTHUSA member of the genus Acanthus of herbaceous prickly plants with toothed leaves, (family Acanthaceae, order Lamiales (formerly Scrophulariales)) found in the south of Europe, Asia
- ACARIDAny parasitic arachnid, such as mites and ticks, of the subclass Acarina.
- ACAROLOGIESThe study of ticks and mites.
- ACAROLOGYThe study of ticks and mites.
- ACARPOUSNot producing fruit; unfruitful; sterile.
- ACCIDIESSloth, slothfulness, especially as inducing general listlessness and apathy.
- ACEDIASpiritual or mental sloth and the feeling it provokes; apathy or indifference; a lack of care or interest and the resultant avoidance of duties; a bored melancholy leading to despe
- ACEDIASSpiritual or mental sloth and the feeling it provokes; apathy or indifference; a lack of care or interest and the resultant avoidance of duties; a bored melancholy leading to despe
- ACENTRICNot centered; without a centre.
- ACEPHALOUSHaving no head.
- ACETYLThe univalent radical CH3CO- derived from acetic acid.
- ACHENEA small, dry, indehiscent fruit, containing a single seed, as in the buttercup.
- ACHOLIADeficiency or absence of bile.
- ACHOLIASDeficiency or absence of bile.
- ACHROMATIZETo deprive of colour; to make achromatic.
- ACHROMOUScolorless; achromatic
- ACMEA high point: the highest point of any range, the most developed stage of any process, or the culmination of any field or historical period.
- ACNEA skin condition, usually of the face, that is common in adolescents. It is characterised by red pimples, and is caused by the inflammation of sebaceous glands through bacterial in
- ACOLYTEOne who has received the highest of the four minor orders in the Catholic Church, being ordained to carry the wine, water and lights at Mass.
- ACONITEThe herb wolfsbane, or monkshood; any plant of the genus Aconitum, all the species of which are poisonous.
- ACROBATAn athlete who performs acts requiring skill, agility and coordination, often as part of a circus performance.
- ACROLITHAn ancient Greek wooden statue furnished with a rupestral head and limbs.
- ACROMEGALYA chronic disease marked by enlargement of the bones of the extremities, face, and jaw that is caused by over-activity of the pituitary gland.
- ACROMIONThe outermost point of the shoulder blade.
- ACRONYMAn abbreviation formed by the initial letters of other words.
- ACROPETALThat develops, matures or opens from the base towards the apex in sequence.
- ACROPHONYThe naming of letters in an alphabetic writing system using words whose initial sounds are represented by the respective letters.
- ACROPOLISA promontory (usually fortified with a citadel) forming the hub of many Grecian cities, and around which many were built for defensive purposes before and during the classical peri
- ACROTISMA lack or defect of the pulse.
- ACTINA globular structural protein that polymerizes in a helical fashion to form an actin filament (or microfilament).
- ACTINALPertaining to the side or surface around the mouth in an animal that has radial symmetry such as a starfish.
- ACTINICRelated to radiation; used most often in reference to light, especially in the ultraviolet range.
- ACTORSomeone who institutes a legal suit; a plaintiff or complainant.
- ADESPOTALiterary works not attributed to (or claimed by) an author.
- ADIAPHORONAn indifferent matter. A matter that is morally neutral. Something neither forbidden nor commanded by scripture.
- ADIAPHOROUSneither harmful nor beneficial
- ADIPSIAAbsence of thirst.
- ADJECTIVEA word that modifies a noun or noun phrase or describes a noun’s referent.
- ADVOCATESomeone whose job is to speak for someone's case in a court of law; a counsel.
- ADYTUMThe innermost sanctuary or shrine in a temple, from where oracles were given.
- AECIDIUMThe cupulate fruiting body borne upon the mycelium of certain fungi commonly parasitic upon specimens of the Compositae, Lamiaceae, Leguminosae, and Ranunculaceae families
- AECIUMA cuplike fruiting structure of some parasitic rust fungi that contains chains of aeciospores.
- AEDINERelating to, or characteristic of mosquitos of the genus Aedes
- AEONCommonwealth standard spelling of eon.
- AERIALLiving or taking place in the air.
- AEROOf or pertaining to aviation.
- AEROBICLiving or occurring only in the presence of oxygen e.g. aerobic bacteria.
- AEROPLANESynonym of airplane. A powered heavier-than-air aircraft with fixed wings.
- AGARICAny of various fungi, principally of the order Agaricales, having fruiting bodies consisting of umbrella-like caps, on stalks, with numerous gills beneath.
- AGATEA semitransparent, uncrystallized silicate mineral and semiprecious stone, presenting various tints in the same specimen, with colors delicately arranged and often curved in parall
- AGAVEAny plant in the large, variable genus Agave of succulent plants, commonly armed with formidable prickles, flowering at maturity after several years, and generally dying thereafter
- AGELASTOne who never laughs (especially at jokes); a mirthless person.
- AGEUSIAAbsence of the sense of taste.
- AGNATHOUSJawless.
- AGNOSIAThe inability to recognise objects by use of the senses.
- AGNOSTICDoubtful or uncertain about the existence or demonstrability of God or other deity.
- AGONA struggle or contest; conflict; especially between the protagonist and antagonist in a literary work.
- AGONISTSomeone involved in a contest or battle (as in an agon), protagonist.
- AGONISTICOf or relating to contests that were originally participated in by the Ancient Greeks; athletic.
- AGONIZETo writhe with agony; to suffer violent anguish.
- AGONYExtreme pain or anguish.
- AGORAA place for gathering.
- AGRIMONYAny of several perennial herbaceous plants, of the genus Agrimonia, that have spikes of yellow flowers.
- AGRONOMYThe science of utilizing plants, animals and soils for food, fuel, feed, fiber, etc.
- AGRYPNIAPersistent loss of sleep; insomnia; sleeplessness.
- AGRYPNIASPersistent loss of sleep; insomnia; sleeplessness.
- AIDOSshame, modesty, or humility, regarded as a virtue in Ancient Greece
- AILUROPHILEA person with ailurophilia; a cat-lover.
- AILUROPHOBIAAn irrational fear or hatred of cats or other felines.
- AILUROPHOBICHaving or relating to a fear or hatred of cats.
- ALCHEMYThe premodern and early modern study of physical changes, particularly in Europe, Arabia, and China; and chiefly in pursuit of an elixir of immortality, a universal panacea, and/or
- ALEMBICAn early chemical apparatus, consisting of two retorts connected by a tube, used to purify substances by distillation.
- ALETHICOf or pertaining to the various modalities of truth, such as the possibility or impossibility of something being true.
- ALEURONEThe protein content of the embryo, endosperm, or perisperm of cereals, in the form of minute particles.
- ALEXIAThe inability, due to a cerebral disorder, to comprehend or understand writing.
- ALEXINA protective substance that exists in the serum or other bodily fluid and is capable of killing microorganisms; complement.
- ALEXITHYMIAA deficiency in understanding, processing, or describing emotions.
- ALEXITHYMICA person who has difficulty feeling, processing or understanding emotions
- ALGESIAsensitivity to pain
- ALGETICProducing or having relation to pain.
- ALGOPHOBIAFear of pain.
- ALGOPHOBIASFear of pain.
- ALGORITHMA collection of ordered steps that solve a mathematical problem. A precise step-by-step plan for a computational procedure that possibly begins with an input value and yields an ou
- ALIPHATICOf a class of organic compounds in which the carbon atoms are arranged in an open chain.
- ALLANTOISA sac, having a number of functions, that develops in the alimentary canal of the embryos of mammals, birds and reptiles.
- ALLOPATRIESThe condition of being allopatric.
- ALLOTROPEAny form of an element that has a distinctly different molecular structure to another form of the same element, with different physical properties and often different chemical prop