Skip to content A B C D E F G H I J K L M N O P Q R S T U V W X Y Z trigynous Having three pistils or styles. trihalide Any halide or organohalide having three halogen atoms. trihalogenomethane Any compound formally derived from methane by replacing three hydrogen atoms with halogens; especially any haloform trihalomethane Any of many halogenated derivatives of methane containing three (not always the same) halogen atoms; many are environmental pollutants triharmonic Describing a class of sixth-order partial differential equations which arises in areas of continuum mechanics trihedral Having three plane faces that meet at a common point trihedron A geometric figure composed of three planes meeting at a single vertex. trihelical Relating to or composed of three helices. trihelium A molecule composed of three helium atoms, or matter composed of such molecules. Symbol: He₃. trihelix Any of a family of transcription factors found in Arabidopsis and other organisms triheme Three heme groups in a hemoprotein trihemeral Relating to a period of three days. trihemiobol A coin worth one-and-a-half obols. trihemitetartemorion A silver coin of Ancient Greece, worth 1½ tetartemoria. triheptadecanoate Any compound containing three heptadecanoate groups, but especially such a triglyceride triheptadecanoin The triglyceride of heptadecanoic acid triheptanoin The triglyceride of heptanoic acid triheteromer A trimer composed of three different monomers triheteromeric Having, or relating to, three different types of subunits. trihex A polyhex composed of three hexagons trihexagonal Pertaining to a semiregular tiling of the Euclidean plane with two triangles and two hexagons alternating on each vertex. trihexose Any trisaccharide derived from three hexose moieties trihexosidase Any enzyme that catalyzes the breakdown of a trihexoside, and often, more specifically, alpha-galactosidase (ceramide trihexosidase), a deficiency of which allows globotriaosylceramide (ceramide trihexoside) to accumulate in the tissues of people with Fabry disease. trihexoside Any glycoside derived from a trihexose trihexosylceramide Any glycosphingolipid derived from a trihexose trihexyphenidyl An antimuscarinic drug that has an antispasmodic action on smooth muscle and is used to treat parkinsonism and some other movement disorders. trihilate Having three apertures, like some grains of pollen. triholomorphic trijective and holomorphic trihoral Occurring once in every three hours. trihourly Three times an hour. trihybrid A hybrid whose parents differ by three pairs of contrasting Mendelian characters. trihydrate A hydrate whose solid contains three molecules of water of crystallization per molecule, or per unit cell. trihydrated Combined with three molecules of water trihydric Having three hydroxy groups. trihydride Any hydride containing three atoms of hydrogen per molecule trihydrochloride Any compound containing three hydrochloride groups trihydrofluoride Any compound having three hydrofluoride moieties trihydrogen A cation triangular molecule composed of three hydrogen atoms, or matter composed of such molecules. Symbol: H₃⁺. trihydroxy Three hydroxy groups in a molecule trihydroxyanthraquinone Any of several isomeric organic compounds with formula C₁₄H₈O₅, formally derived from anthraquinone by replacing three hydrogen atoms by hydroxyl groups, and including several historically important dyes. trihydroxybenzene Any trihydroxy derivative of benzene trihydroxybenzoate Any salt or ester of a trihydroxybenzoic acid. trihydroxybenzoic Relating to trihydroxybenzoic acids. trihydroxycholesterol Any trihydroxy derivative of cholesterol, but especially (3β)-cholest-5-ene-1,1,2,3-tetrol trihydroxylated Modified by the addition of three hydroxyl groups trihydroxylation hydroxylation at three sites in a molecule trihydroxymethylanthraquinone Any trihydroxy, methyl derivative of anthraquinone, but especially 6-methyl-1,3,8-trihydroxyanthraquinone (emodin) trihydroxystilbene resveratrol trihypostatic Of or relating to the three persons or hypostases of the Trinity. triindole Any compound that has three indole rings triiodide Any compound containing a I₃⁻ moiety consisting of three iodine atoms in a more or less linear configuration. triiodination The addition of three atoms of iodine to a compound triiodo Three iodine atoms in a molecule. triiodomethane iodoform triiodophenol Any triiodo derivative of phenol triiodothyronine A thyroid hormone, with the chemical formula C₁₅H₁₂I₃NO₄, affecting almost every process in the body, including body temperature, growth, and heart rate. triiridium Three atoms of iridium in a chemical compound. triisobutylsilane A silane that has three isobutyl groups triisodontid Any extinct mammal in the family Triisodontidae. triisopropyl Three isopropyl groups attached to the same atom or group in a molecule triisopropylsilane The silane ((CH₃)₂CH-)₃SiH used as a scavenger in peptide synthesis trijective Relating to a trijection trijet An aircraft powered by three jet engines. trijugate In three pairs. trijugous trijugate. trijunction A junction where three things meet. Trikala A city in Thessaly, Greece. trikalsilite A hexagonal-pyramidal colorless mineral containing aluminum, oxygen, potassium, silicon, and sodium. trikaryotic Having three nuclei trikatu A digestive stimulant consisting of equal parts ginger root, black pepper, and long pepper. Trikaya A fundamental doctrine within Mahayana and Vajrayana Buddhism that delineates the multidimensional nature of a Buddha's existence in three distinct bodies or aspects. trike A tricycle, typically that of a child. triker Synonym of tricyclist. triketide Any compound containing three ketide groups triketone Any ketone having three carbonyl groups trikini A swimsuit comprising three separate pieces of fabric, typically bottoms and one for each breast. trikir Synonym of trikirion. trikirion A liturgical candlestick holding three candles, used in the Eastern Orthodox and Eastern Catholic Churches. trikonasana A pose in which the legs are kept straight and wide apart, in the shape of a triangle, while the upper body bends. trilabe A three-pronged surgical instrument for removing calculi from the bladder. trilabiate three-lipped trilaciclib A medication used to reduce the frequency of chemotherapy-induced bone marrow suppression. trilactone Any compound that contains three lactone groups trilacunar Having or relating to three lacunae. trilamellar Having three lamellae. trilamellate Synonym of trilamellar. trilamellated Synonym of trilamellar. trilaminar Formed of, or having, three laminae, or thin plates. trilaminate Having three layers trilaryngealism A school of thought that argues that that the reconstruction of Proto-Indo-European requires three laryngeal consonants, usually marked as ⟨h₁⟩, ⟨h₂⟩, and ⟨h₃⟩. trilateral Having three sides trilateralism A trilateral or three-sided arrangement. trilaterality The state or condition of being trilateral. trilateralization The process of trilateralizing. trilateralize To make or become trilateral. trilaterally In a trilateral way. trilateralness The quality of being trilateral. trilaterate To locate by means of trilateration trilateration The determination of the location of a point based on its distance from three other points. trilaurin The triglyceride of lauric acid trilaurylamine An amine with three lauryl radicals, used primarily as an extractant. trilayer Any structure consisting of three layers trilayered Having three layers. trilbied Wearing a trilby. trilby narrow-brimmed type of felt hat, described as having a "shorter brim which is angled down at the front and slightly turned up at the back" in comparison to the fedora Trilbymania Enthusiasm for George du Maurier's 1894 novel Trilby. trilemma A circumstance in which a choice must be made between three options that seem equally undesirable. trilemmatic Of or relating to a trilemma. Trilene a common Tradename of trichloroethylene in anaesthesia, often dyed blue trilepton Any particle formed from three leptons trilerp to interpolate trilinearly trilete Having three lines indicating the splitting axes. trilevel Of three levels. trilineage Affecting all three (blood) cell lineages (red cells, white cells and platelets) trilinear Having, or bounded by, three lines. trilinearity The condition of being trilinear trilinearly In a trilinear manner trilineate Synonym of trilinear. trilineated Synonym of trilinear. trilingual Able to read or speak three languages. trilingualism The condition of being trilingual; the ability to speak three languages. trilingualist A trilingual person. trilingually In a trilingual manner; in or with three languages. trilinguar trilingual trilinguist One who speaks three languages. trilinoleate Any compound (typically a triglyceride) that has three linoleate groups trilinolein The triglyceride of linoleic acid trilinolenate Any compound (typically a triglyceride) that has three linolenate groups trilinolenin The triglyceride of linolenic acid triliteracy The capability of reading and writing in three languages. triliteral Consisting of three letters. triliteralism The quality of being triliteral. triliterality The quality of being triliteral. triliterally In a triliteral manner. triliteralness triliterality triliterate Capable of reading and writing in three languages. trilith A trilithon. trilithic Pertaining to a trilithon. trilithionite A monoclinic-prismatic white mineral containing aluminum, fluorine, lithium, oxygen, potassium, and silicon. trilithium Three lithium atoms in a molecule. trilithon A structure consisting of two stone pillars supporting a horizontal stone. Trilj A town in Croatia. trill A rapid alternation between an indicated note and the one above it as an ornament; in musical notation usually indicated with the letters tr written above the staff. trillennial Pertaining to an age or duration of 3,000 years. trillenoside A particular steroid glycoside. triller A small passerine bird of the genus Lalage belonging to the cuckooshrike family Campephagidae, so called because of the loud trilling calls of the male birds. trillest Rillest. trilliaceous Of or relating to the Trilliaceae. trilliant A gemstone cut in a triangular shape. trilliard One thousand long scale trillions, or one short scale sextillion; equal to 10²¹ (1 followed by twenty-one 0s).