9-letter words containing o, r, a, i
- titration — an operation, used in volumetric analysis, in which a measured amount of one solution is added to a known quantity of another solution until the reaction between the two is complete. If the concentration of one solution is known, that of the other can be calculated
- to a hair — exactly; right in every detail
- tocharian — a member of a central Asian people of high culture, who were assimilated with other peoples about the 11th century a.d.
- togavirus — a virus belonging to the Togaviridae family and which usually affects birds and mammals rather than humans
- tokharian — a member of a central Asian people of high culture, who were assimilated with other peoples about the 11th century a.d.
- tonsillar — a prominent oval mass of lymphoid tissue on each side of the throat.
- tonsorial — of or relating to a barber or barbering: the tonsorial shop.
- torbanite — Petrology. a dark-brown oil shale containing a large amount of carbonaceous matter.
- torsional — the act of twisting.
- totalizer — a person or thing that totals.
- tovarisch — comrade (used as a term of address in the Soviet Union).
- toy train — child's plaything: miniature train
- tradition — the handing down of statements, beliefs, legends, customs, information, etc., from generation to generation, especially by word of mouth or by practice: a story that has come down to us by popular tradition.
- trail off — diminish
- train oil — oil obtained from the blubber of whales or from seals, walruses, or other marine animals.
- trainload — the cargo or passenger capacity of a train.
- traitorly — of or characteristic of a traitor
- transonic — close to the speed of propagation of sound; moving at 700–780 miles per hour (1127–1255 km/h) at sea level.
- trapezoid — Geometry. a quadrilateral plane figure having two parallel and two nonparallel sides. British. trapezium (def 1b).
- trasimeno — a lake in central Italy, in Umbria near Perugia: Romans defeated by Hannibal 217 b.c. About 50 sq. mi. (130 sq. km).
- trattoria — a usually inexpensive or informal restaurant or cafe specializing in Italian dishes.
- trebbiano — a type of grape and vine cultivated in Italy for making wine (by the same name)
- trematoid — relating to a trematode
- trialogue — a discussion or conversation in which three persons or groups participate.
- triathlon — an athletic contest comprising three consecutive events, usually swimming, bicycling, and distance running.
- triatomic — having three atoms in a molecule.
- triclosan — a drug used to treat skin infections
- trifocals — glasses with trifocal lenses
- trigamous — of or relating to trigamy or a trigamist.
- trilobate — having three lobes.
- trination — celebration of Mass three times on the same day by the same priest.
- trinomial — Algebra. consisting of or pertaining to three terms.
- trionymal — having a name that consists of three separate parts
- trisagion — an ancient hymn
- tritanope — a person who cannot distinguish the colour blue
- troparion — (in the Greek Orthodox Church) a verse or short hymn
- tsavorite — a green variety of grossularite, found in Kenya in 1975 and used as a gem.
- tubicolar — living in a self-constructed tube
- tyropitta — a Greek cheese pie
- uncordial — unfriendly
- uniocular — monocular.
- uniparous — Zoology. producing only one egg or offspring at a time.
- uniramous — Biology. having one branch.
- unorganic — noting or pertaining to a class of chemical compounds that formerly comprised only those existing in or derived from plants or animals, but that now includes all other compounds of carbon.
- urination — to pass or discharge urine.
- urokinase — an enzyme, present in the blood and urine of mammals, that activates plasminogen and is used medicinally to dissolve blood clots.
- urolagnia — a sexual activity involving arousal from urine and urination
- uropygial — of or relating to the uropygium.
- uvarovite — Mineralogy. a variety of garnet colored emerald-green by the presence of chromium.
- vagarious — characterized by vagaries; erratic; capricious: a vagarious foreign policy.