15-letter words containing a, c, t, i, o
- thyroid extract — the powdered preparation made from the thyroid gland of certain animals, used to treat hypothyroidism
- ticket of leave — (formerly) a permit allowing a convict to leave prison, under certain restrictions, and go to work before having served a full term, somewhat similar to a certificate of parole.
- to call in sick — If you call in sick, you telephone the place where you work to tell them you will not be coming to work because you are ill.
- to carry weight — If a person or their opinion carries weight, they are respected and are able to influence people.
- topographic map — a map showing topographic features, usually by means of contour lines.
- torsion balance — an instrument for measuring small forces, as electric attraction or repulsion, by determining the amount of torsion or twisting they cause in a slender wire or filament.
- toucan crossing — a place where people who are walking and cyclists can both cross a busy road together. They press a button at the side of the road, which operates traffic lights to stop the traffic
- touch base with — the bottom support of anything; that on which a thing stands or rests: a metal base for the table.
- tourist traffic — the number of tourists that visit an area
- traction engine — a locomotive operating on surfaces other than tracks and pulling heavy loads, as fallen logs.
- tractive effort — the force exerted by a locomotive or other powered vehicle on its driving wheels.
- tractor-trailer — a combination trucking unit consisting of a tractor hooked up to a full trailer or a semitrailer.
- trading account — an account similar to a traditional bank account, holding cash and securities, and administered by an investment dealer
- trading company — a company that is owned by the people who have bought shares in that company
- traffic control — management of road use
- traffic offence — a violation of traffic regulations, such as breaking the speed limit
- training course — practical programme of study
- training school — a school that provides training in some art, profession, or vocation.
- transactionally — the act of transacting or the fact of being transacted.
- transhistorical — occurring throughout all human history
- traumatological — relating to traumatology
- traveling block — (in a hoisting tackle) the block hooked to and moving with the load.
- trichloroacetic — as in trichloroacetic acid
- trichloroethane — a volatile nonflammable colourless liquid with low toxicity used for cleaning electrical apparatus and as a solvent; 1,2,3-trichloroethane. Formula: CH3CCl3
- trichomonacidal — relating to a trichomonacide
- tricolor camera — a camera for taking color photographs in which three separation negatives are exposed simultaneously by splitting the light from the subject with prisms and mirrors, and exposing through appropriate filters.
- trithionic acid — a thionic acid, H2S3O6
- tropicalization — to make tropical, as in character or appearance.
- truman doctrine — the policy of President Truman, as advocated in his address to Congress on March 12, 1947, to provide military and economic aid to Greece and Turkey and, by extension, to any country threatened by Communism or any totalitarian ideology.
- tuberculization — the process of becoming, or of causing people or animals to become, infected with tuberculosis
- turkish tobacco — a strongly aromatic tobacco, grown chiefly in Turkey and Greece, used in cigarettes.
- typographically — of or relating to typography.
- ultra-patriotic — of, like, suitable for, or characteristic of a patriot.
- ultracommercial — concerned with nothing but profit
- ultraconvenient — extremely convenient
- ultrademocratic — (in the US) characteristic of a staunch member or supporter of the Democratic Party and its agenda
- ultramicrofiche — ultrafiche.
- ultramicrometer — a micrometer calibrated to a very fine scale and capable of measuring extremely small magnitudes.
- ultramicroscope — an instrument that uses scattering phenomena to detect the position of objects too small to be seen by an ordinary microscope.
- ultramicroscopy — the use of the ultramicroscope.
- un-coincidental — happening by or resulting from coincidence; by chance: a coincidental meeting.
- un-romanticized — to make romantic; invest with a romantic character: Many people romanticize the role of an editor.
- unaccommodating — easy to deal with; eager to help or please; obliging.
- unapostolically — in an unapostalic manner
- uncategorizable — not able to be categorized or placed into a category
- uncommunicating — to impart knowledge of; make known: to communicate information; to communicate one's happiness.
- uncommunicative — not inclined to talk or disclose information; reserved; taciturn.
- uncompassionate — having or showing compassion: a compassionate person; a compassionate letter.
- uncomplaisantly — in an uncomplaisant manner
- uncomplimentary — of the nature of, conveying, or expressing a compliment, often one that is politely flattering: a complimentary remark.