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 tricouni A kind of metal nail fixed to the soles of shoes or boots to improve their grip. tricounty Of or pertaining to three counties. tricrepid Having a triaxonic crepis. tricresol A commercial mixture of the three isomers of cresol. tricresyl Three cresyl groups in a compound tricriterion Any of three criteria in the same system tricritical Describing a condition, in condensed matter, in which three phases are in equilibrium tricriticality The condition of being tricritical; a tricritical system tricrotic Of or pertaining to tricrotism; characterized by tricrotism. tricrotism The condition of the arterial pulse in which there is a triple beat, so that the pulse curve shows two secondary crests in addition to the primary one. tricrural Having three legs. tricrystal A semiconductor (or similar device) incorporating a junction of three crystals. trictenotomid Any beetle in the family Trictenotomidae. tricube A polycube composed of three cubes. tricubic Involving three cubic forms triculate To beautify; to pretty tricultural Of, relating to, or containing three cultures. triculturalism The state or quality of being tricultural. triculturally In a tricultural manner. triculture A state, nation etc. that contains three distinct cultures. tricursal being composed of three contours tricurvate Curved in three directions. tricuspal Consisting of, or relating to, three cusps. tricuspid Having three cusps, e.g. a molar tooth tricuspidate three-pointed; ending in three points. tricuspoid That has three cusps tricussate Having whorls of three leaves each, the leaves of each whorl alternating with those above and below. tricyanide Any compound containing three cyanide groups tricyanomethane cyanoform tricyclazole A particular fungicide. tricycle A cycle with three wheels, powered by pedals and usually intended for young children. tricyclelike Resembling or characteristic of a tricycle. tricyclene The tricyclic hydrocarbon 1,7,7-trimethyltricyclo[2.2.1.0(2,6)]heptane tricycler A tricyclist. tricyclic Having three rings of atoms in the molecule. tricyclist A person who rides a tricycle. tricyclo Describing a molecular structure having three rings (either fused, or having a common bridgehead atom) tricyclobutabenzene A tetracyclic aromatic hydrocarbon composed of three cyclobutane rings fused to a central benzene tricyclohexylammonium The cation formed by replacing three hydrogen atoms of an ammonium cation with cyclohexyl groups tricyclon Any of a group of cyclotides found in the plant Viola tricolor tricyclooxyisohumulone An oxidised humulone produced during the storage of hops tricyclops A three-eyed cyclops. tricycloquinazoline A bicyclic aromatic compound with three fused rings. tricylinder A solid formed by three intersecting cylinders. tricylindrical Of or relating to three cylinders. Trida A locality in the Shire of Baw Baw and South Gippsland Shire, south eastern Victoria, Australia. tridacna Any member of the genus Tridacna of large saltwater clams with heavy fluted shells. tridacnid Any clam in the family Tridacnidae, now considered to be the cardiid subfamily Tridacninae. tridacnine Any giant clam of the subfamily Tridacninae tridactyl Having three digits on a limb. tridactylid Any pygmy mole cricket in the family Tridactylidae. tridactylous tridactyl tridactyly The property of being tridactyl; having three digits (fingers or toes) on a limb. tridaily Three times a day or every third day. tridarn A kind of cupboard or dresser with three tiers. tride strong and swift tridecacopper Thirteen atoms of copper in a chemical compound (Cu₁₃). tridecagon A polygon having thirteen sides and thirteen angles. tridecagonal Having thirteen sides and angles, similar to a tridecagon. tridecagram A star polygon that has thirteen vertices. tridecahedron A polyhedron with thirteen faces. tridecahydrate A hydrate whose solid contains thirteen molecules of water of crystallization per molecule, or per unit cell. 13H₂O tridecamanganese Thirteen atoms of manganese in a chemical compound (Mn₁₃). tridecamer An oligomer having thirteen subunits. tridecameric Of or pertaining to a tridecamer. tridecanal The saturated aliphatic aldehyde that has thirteen carbon atoms C₁₂H₂₅-CHO tridecane Any of very many isomeric saturated aliphatic hydrocarbons having thirteen carbon atoms, but especially n-tridecane, CH₃(CH₂)₁₁CH₃ tridecanoate Any salt or ester of tridecanoic acid tridecanoic Of or pertaining to tridecanoic acid or its derivatives tridecanone Any aliphatic ketone, formally derived from tridecane, containing thirteen carbon atoms tridecaoxide Any oxide containing thirteen atoms of oxygen per molecule, O₁₃. tridecapeptide Any oligopeptide having thirteen amino acid residues tridecaploid Having thirteen complete sets of chromosomes in a single cell tridecasaccharide An oligosaccharide composed of thirteen monosaccharide groups tridecasodium Thirteen atoms of sodium in a chemical compound (Na₁₃). tridecasyllabic Having thirteen syllables, or thirteen syllables per line. tridecene Any aliphatic hydrocarbon having a chain of thirteen carbon atoms and containing one double bond. tridecennary Of or pertaining to the number thirteen tridecimal Of a number, expressed in base thirteen. tridecyl The univalent radical derived from tridecane tridecylic Relating to the fatty acid that has 13 carbon atoms tridecyne Any aliphatic hydrocarbon having a chain of thirteen carbon atoms and containing one triple bond. tridegree The condition of being cubic tridem An arrangement of three objects arranged one behind the other. tridemic Synonym of tripledemic (“a combination of three pandemics”). Tridemism The Three Principles of the People. tridemorph A particular fungicide. tridenchthoniid Any pseudoscorpion in the family Tridenchthoniidae. tridendriform Composed of three trees trident A three-pronged spear somewhat resembling a pitchfork. tridental Having three prongs or tines. tridentate Having three teeth tridentated Having three teeth; tridentate. tridented Having three prongs. tridentiferous Bearing a trident. Tridentine Relating to Trent, Italy. Tridentinian Synonym of Tridentine. tridentlike Resembling a trident; having three prongs. tridentoid Having three "teeth" trideo A three-dimensional video. trideoxynucleotide Any oligonucleotide composed of three deoxynucleotides trideoxyribose A trideoxynucleotide derived from deoxyribose tridepside A trimeric depside tridermic Relating to the three germ layers of the embryo: ectoderm, endoderm and mesoderm tridesmosidic Pertaining to a saponin with three sugar chains. trideuterium A molecule composed of three deuterium atoms, or matter composed of such molecules. Symbol: ²H₃ or D₃. Tridevi A trinity of supreme divinity in Hinduism. tridiagonal Having nonzero elements only in the main diagonal and the diagonals directly above and below it. tridiagonality The condition (of a matrix) of being tridiagonal tridiagonalization The formation of a tridiagonal matrix tridialectal Capable of using three dialects of a language. tridialectalism The use of three dialects of a language. tridiapason A triple octave, or twenty-second. tridigital three fingered. tridigitate Having three fingers or finger-like projections. tridihexethyl A chemical compound whose chloride is used as an anticholinergic, antimuscarinic and antispasmodic drug. tridim Synonym of trideo (“a three-dimensional video”). tridimensional three-dimensional tridimensionality The quality of being tridimensional. tridimensionally In three dimensions. tridiminished Having had three cupolae removed. tridirectional In, or relating to, three directions. tridirectionally In three directions. tridiurnal Of or relating to three days. tridominium A tripartite condominium (joint sovereignty over territory), one involving three sovereign powers. tridoped doped with three different elements tridoping doping with three different elements tridosha The three doshas, vatha, pitha, and kaptha. tridrachma An Ancient Greek silver coin worth three drachmas. tridrive Pertaining to three drive axles on a vehicle; pertaining to the drive system of a truck with 3 powered rear axles. triduan Lasting three days. triduum A period of three days (especially in Roman Catholic liturgy). tridymite A rare mineral of volcanic rocks that solidified at a high temperature, with the chemical composition silicon dioxide, SiO₂. Tridymite is chemically identical to quartz, but has a different crystal structure. Sometimes contains sodium aluminum silicate, which seems to be expelled when quartz solidifies at lower temperatures. trie An ordered tree data structure that is used to store an associative array where the keys are usually strings. tried Tested, hence, proven to be firm or reliable. trieicosenoin The triglyceride of eicosenoic acid triel An element from group 13 of the periodic table which includes boron, aluminium, gallium, indium, and thallium. trielectronic Of or pertaining to three electrons trielemental Having three different elements (in various senses). triene Any alkene that has three double bonds triennial Happening every three years. triennially Occurring at intervals three years apart. triennium A period of three years. trienoic Describing a carboxylic acid (especially a polyunsaturated fatty acid) that has three double bonds in its chain triens A bronze coin minted during the Roman Republic valued at 4 unciae. trientine Triethylenetetramine dihydrochloride, an oral copper chelating agent used to treat Wilson's disease. triepoxide Any compound that has three epoxide rings triequal Equal and three in number. trier One who tries; one who makes experiments or examines anything by a test or standard. trierarch The captain of a trireme.