15-letter words containing r, t, c
- air conditioner — An air conditioner is a machine which keeps the air in a building cool and dry.
- airborne attack — an attack involving airborne troops
- airconditioning — Alternative spelling of air conditioning.
- aircraft hangar — a large workshop or building for storing and maintaining aircraft
- airmail sticker — a sticker that is put on airmail letters to make sure they are not sent by surface mail
- alberta clipper — (in Canada) an area of low pressure that forms in winter near the Rocky Mountains
- alder buckthorn — a Eurasian rhamnaceous shrub, Frangula alnus, with small greenish flowers and black berry-like fruits
- algorithmically — Using an algorithm.
- alignment chart — nomogram.
- allorecognition — The ability of an individual organism to distinguish its own tissues from those of another.
- allotriomorphic — (of minerals) not having their own regular shape (as determined by their internal structure) but being shaped instead by adjacent minerals
- allyl mercaptan — a colorless liquid, C 3 H 6 S, having a strong, garlicky odor, used in the manufacture of pharmaceuticals.
- alopecia areata — loss of hair in circumscribed patches.
- alpine accentor — a small bird of the sparrow family, Prunella collaris, found especially in mountain regions of S Europe and Asia
- alta california — a former Spanish colony of New Spain, in the modern-day states of California, Nevada, and N Arizona: ceded by Mexico to the United States 1848.
- ambrosian chant — the liturgical chant, established by Saint Ambrose, characterized by ornamented, often antiphonal, singing.
- ambulance train — a train designed to carry sick or injured people
- ambulatory care — care given at a hospital to non-resident patients, including minor surgery and outpatient treatment
- amegakaryocytic — Characterized by a lack of megakaryocytes.
- america firster — a member or supporter of the America First Committee.
- american beauty — a variety of hybrid, perennial red rose
- american blight — any plant louse of the family Aphididae, characterized by a waxy secretion that appears like a jumbled mass of fine, curly, white cottony or woolly threads, as Eriosoma lanigerum (woolly apple aphid or American blight) and Prociphilus tessellatus (woolly alder aphid)
- american cotton — upland cotton.
- american gothic — a painting (1930) by Grant Wood.
- american marten — pine marten (def 2).
- american smooth — a style of competitive ballroom dancing which incorporates elements of Latin dance
- americanization — Americanization is the process by which people or countries become more and more similar to Americans and the United States.
- americanologist — a foreign expert or specialist in American cultural or political matters: a leading Americanologist in the Kremlin.
- amphitheatrical — Having some of the characteristics of an amphitheatre.
- anacostia river — a river in the District of Columbia flowing into the Potomac River. about 24 miles (39 km) long.
- analog computer — a mechanical, electrical, or electronic computer that performs arithmetical operations by using some variable physical quantity, such as mechanical movement or voltage, to represent numbers
- anchorage point — a point to which something such as the straps securing a childseat can be safely attached
- ancient history — Ancient history is the history of ancient civilizations, especially Greece and Rome.
- andrew of crete — a.d. c650–730, Greek poet and Orthodox archbishop of Crete.
- anfractuosities — Plural form of anfractuosity.
- angina pectoris — a sudden intense pain in the chest, often accompanied by feelings of suffocation, caused by momentary lack of adequate blood supply to the heart muscle
- anisotropically — Physics. of unequal physical properties along different axes. Compare isotropic (def 1).
- annuity certain — an annuity payable for a certain number of years regardless of any contingency.
- antarctic beech — any tree of the genus Nothofagus, related to the beech and native to temperate Australasia and South America, esp Nothofagus cunninghamii of SE Australia or Nothofagus moorei of NE Australia
- antarctic ocean — the sea surrounding Antarctica, consisting of the most southerly parts of the Pacific, Atlantic, and Indian Oceans
- antarctic plate — a major tectonic division of the earth's crust, comprising Antarctica and adjacent ocean basins (the South Indian, Southeast Pacific, and Atlantic-Indian basins) and bounded on the north by the Nazca, South American, African, Indo-Australian, and Pacific plates.
- anthropocentric — regarding man as the most important and central factor in the universe
- anthropological — the science that deals with the origins, physical and cultural development, biological characteristics, and social customs and beliefs of humankind.
- anthropometrics — the science of measuring the size and proportions of the human body (called anthropometry), especially as applied to the design of furniture and machines.
- anthropomorphic — Anthropomorphic means relating to the idea that an animal, a god, or an object has feelings or characteristics like those of a human being.
- anthropopsychic — the attribution of consciousness to divine beings and nature
- anti-allergenic — not aggravating an allergy; intended or prepared for those suffering from an allergy: antiallergenic cosmetics.
- anti-censorship — the act or practice of censoring.
- anti-commercial — of, relating to, or characteristic of commerce.
- anti-conformist — a person who conforms, especially unquestioningly, to the usual practices or standards of a group, society, etc.