Showing 1,601 to 1,700 of 3,038.
- KERATINThe protein of which hair and nails are composed.
- KERYGMAThe proclamation of religious truths; core religious teaching; preaching.
- KIDNEYAn organ in the body that filters the blood, producing urine.
- KILOMETREAn SI unit of length equal to 10 metres. Symbol: km
- KINASEAny of a group of enzymes that transfer phosphate groups from high-energy donor molecules, such as ATP, to specific target molecules (substrates), in a process termed phosphorylati
- KINEMATICSThe branch of mechanics concerned with objects in motion, but not with the forces involved.
- KINETICRelating to motion.
- KINETICSThe branch of mechanics concerned with motion of objects, as well as the reason i.e. the forces acting on such bodies. This, along with kinematics constitute dynamics, which is con
- KINETOCHOREThe protein structure in eukaryotes which assembles on the centromere and links the chromosome to microtubule polymers from the mitotic spindle during mitosis.
- KITHARAAlternative form of cithara.
- KLAXONA loud electric alarm or horn, especially as used in automobiles in the early 20th century.
- KLENDUSITYResistance to infection.
- KLEPTOMANIAA psychological disorder that causes an uncontrollable obsession with stealing without economic or material need.
- KLEPTOMANIACOne who steals compulsively.
- KLYSTRONan electron tube used to amplify microwave-frequency electromagnetic radiation.
- KOINEA linguistic variety that has developed in supraregional contact between speakers of various interrelated dialects, typically in such a way that features shared by several dialects
- KOPPAAn Ancient Greek letter representing /k/, Ϙ / ϙ, replaced by kappa by the Classical Greek period.
- KOREAn Ancient Greek statue of a woman, portrayed standing, usually clothed, painted in bright colours and having an elaborate hairstyle.
- KOUROSA sculpture of a naked youth in Ancient Greece, the male equivalent of a kore.
- KRYPTONThe chemical element (symbol Kr) with an atomic number of 36. It is a colourless, odourless noble gas that only reacts with fluorine. It is one of the rarest gases in the Earth's a
- KUDOSPraise; accolades.
- KYANITEA blue neosilicate mineral, Al2SiO5, found in metamorphic rocks.
- KYLIXAn Ancient Greek drinking cup with a stem, two handles, and a broad, shallow body.
- KYPHOTICRelating to, or exhibiting, kyphosis.
- LABDANUMA sticky brown resin obtained from species of rockrose, used mainly in perfume.
- LABRYSA double-headed axe in Minoan mythology.
- LABYRINTHA maze-like structure built by Daedalus in Knossos, containing the Minotaur. A complicated irregular network of passages or paths, especially underground or covered, in which it is
- LACONISMExtreme brevity in expression.
- LAETRILEA drug, derived from the amygdalin of apricot kernels, once thought capable of destroying cancer cells by the release of cyanide but later banned in the United States by the FDA.
- LAGENAThe upper part of the cochlear duct.
- LAICA layperson as opposed to a cleric, i.e. not a member of the clergy.
- LAITYPeople of a church who are not ordained clergy or clerics.
- LAMBDAThe eleventh letter of the Classical and Modern Greek alphabet, the twelfth of the Old Greek alphabet.
- LAMIAA monster preying upon human beings, who sucked the blood of children, often described as having the head and breasts of a woman and the lower half of a serpent.
- LARCENYThe unlawful taking of personal property as an attempt to deprive the legal owner of it permanently.
- LARCHA coniferous tree, of genus Larix, having deciduous leaves in fascicles.
- LARYNXA hollow muscular organ of the neck of mammals situated just below where the tract of the pharynx splits into the trachea and the oesophagus. It is involved in breath control and p
- LATRIAThe highest form of worship, named adoration, properly given to the triune God alone.
- LAURAA number of hermitages or cells in the same neighborhood occupied by anchorites who were under the same superior
- LECITHINThe principal phospholipid in animals; it is particularly abundant in egg yolks, and is extracted commercially from soy. It is a major constituent of cell membranes, and is commonl
- LECTOTYPEA biological specimen or illustration later selected to serve as definitive type example of a species or subspecies when the original author of the name did not designate a holotyp
- LEKYTHOSA pottery flask with a narrow neck, used in Ancient Greece for storing oil.
- LENTILAny of several plants of the genus Lens, especially Lens culinaris, from southwest Asia, that have edible, lens-shaped seeds within flattened pods.
- LEPERA person who has leprosy, a person suffering from Hansen's disease.
- LEPIDOTECovered with scurfy scales.
- LEPROSESynonym of leprous, afflicted with leprosy.
- LEPROUSOf or relating to one of the diseases known as leprosy.
- LEPTINA protein hormone produced in adipose tissue; it plays a role in regulating appetite and metabolism.
- LEPTONA coin used since ancient times in Greece, serving in modern times as one hundredth of a phoenix, a drachma, and a euro (as the Greek form of the Eurocent).
- LETHALOf, pertaining to, or causing death; deadly; mortal; fatal.
- LETHARGICSluggish, slow.
- LETHARGYA state of extreme torpor, sopor or apathy, especially with lack of emotion, energy or enthusiasm; sluggishness, laziness.
- LETHEForgetfulness of the past; oblivion.
- LETHEANOf or relating to death or forgetfulness.
- LEUCINEAn essential amino acid, C6H13NO2, isomeric with isoleucine, found in most animal proteins; it is essential for growth in children.
- LEUCISTICAffected by leucism.
- LEUCITEA mineral of silica-poor igneous, plutonic and volcanic rocks. Chemically, leucite is a potassium feldspar with insufficient silica to satisfy the chemical bonds. Because of the un
- LEUCOOf or relating to leuco dyes and their related compounds.
- LEUCOMAAn opaque area or scar on the cornea of an eye
- LEUKEMIAAny of a class of types of cancer affecting the blood cells, especially the white blood cells (usually with massive leukocytosis), and the blood cell–forming (hematopoietic) tissue
- LEWDLascivious, sexually promiscuous, rude.
- LEXISThe set of all words and phrases in a language; any unified subset of words from a particular language.
- LICENSEA legal document giving official permission to do something; a permit.
- LICHENAny of many symbiotic organisms, being associations of algae and fungi, often found as white or yellow-to-blue–green patches on rocks, old walls, etc.
- LICORICEA plant of species Glycyrrhiza glabra, or sometimes in North America, the related American licorice plant Glycyrrhiza lepidota.
- LIGUREA gemstone, supposed to have been a form of agate
- LILYAny of several flowers in the genus Lilium of the family Liliaceae, which includes a great many ornamental species.
- LIMONITEAny of several natural hydrous iron oxides; often a mixture of goethite and hematite with clays and manganese oxide.
- LIONA big cat, Panthera leo, native to Africa, India and formerly much of Europe.
- LIPIDAny of a group of organic compounds including the fats, oils, waxes, sterols, and triglycerides. Lipids are characterized by being insoluble in water.
- LIPOGRAMA word or writing that does not use a particular symbol or symbols.
- LIPOSOMEAn aqueous compartment enclosed by a bimolecular membrane, typically of phospholipid; a lipid vesicle.
- LITANYA ritual liturgical prayer in which a series of prayers recited by a leader are alternated with responses from the congregation.
- LITHARGElead monoxide (PbO) a toxic solid formed from oxidation of lead in air, and used as a pigment.
- LITHIALithium oxide, Li2O, used in the manufacture of ceramics and glass.
- LITHIUMThe simplest alkali metal, the lightest solid element, and the third lightest chemical element (symbol Li) with an atomic number of 3 and atomic weight of 6.94. It is a soft, silve
- LITHOPONEA white pigment, a mixture of barium sulfate and zinc sulfide, used in paints and enamels.
- LITHOTOMEAn instrument used for cutting the bladder to remove a calculus; a cystotome.
- LITHOTRIPSYA treatment, typically using ultrasound shock waves or crushing with a surgical instrument, by which a kidney stone or similar calculus is broken into particles small enough to be
- LITOTESA figure of speech whereby something is stated by denying its opposite. The negation of a negative quality to assert a positive.
- LITREThe metric unit of fluid measure, equal to one cubic decimetre. Symbol: L, l, or ℓ.
- LITURGICliturgical
- LITURGYA predetermined or prescribed set of rituals that are performed, usually by a religion; a book in which they are recorded.
- LOBEAny projection or division, especially one of a somewhat rounded form.
- LOBUSA lobe.
- LOCHIANormal post-partum vaginal discharge; blood, mucus, and placental tissue that are discharged from a female's vagina (similar to menstruation) for several weeks after she has given
- LOGAOEDICOf any metre rhythmically intermediate between ordinary speech (or prose) and song (or poetry), typically combining dactyls and trochees.
- LOGARITHMFor a number x, the exponent by which a given base number must be raised in order to obtain the power x. Written logbx. For example, log101000=3 because 103=1000 and log216=4 becau
- LOGICLogical.
- LOGISTICRelating to symbolic logic.
- LOGISTICSThe process of planning, implementing, and controlling the efficient, effective flow and storage of goods, services and related information from their point of origin to point of c
- LOGOMACHYDispute over the meaning of words
- LOGOSA form of rhetoric in which the writer or speaker uses logical argument as the main form of persuasion.
- LOGOTHETEAny of various state officials or functionaries in the Byzantine Empire.
- LOOSETo let loose, to free from restraints.
- LOOSESTRIFEAny of certain flowering plants of the genera Lythrum and Lysimachia, which are in different taxonomic families.
- LOPOLITHa mass of volcanic or igneous rock found within strata which has spilled downward into underlaying strata and forms depressed regions.
- LOTUSAny member of the genus Nelumbo of aquatic plants in the family Nelumbonaceae.
- LYCANTHROPEA werewolf.
- LYCEUMA public hall designed for lectures, readings, or concerts.