18-letter words containing a, s, y, u, t
- mutually recursive — recursion
- natural philosophy — natural science.
- nebular hypothesis — the theory that the solar system evolved from a mass of nebular matter: prominent in the 19th century following its precise formulation by Laplace.
- neutrino astronomy — the branch of astronomy dealing with the detection and measurement of neutrinos emitted by the sun and other celestial objects.
- nursery facilities — places where young children are looked after
- open heart surgery — surgery performed on the exposed heart while a heart-lung machine pumps and oxygenates the blood and diverts it from the heart.
- open-heart surgery — surgery performed on the exposed heart while a heart-lung machine pumps and oxygenates the blood and diverts it from the heart.
- payment by results — a system of wage payment whereby all or part of the wage varies systematically according to the level of work performance of an employee
- pennsylvania dutch — the descendants of 17th- and 18th-century settlers in Pennsylvania from southwest Germany and Switzerland.
- physical education — systematic instruction in sports, exercises, and hygiene given as part of a school or college program.
- pigmy hippopotamus — a related but smaller animal, Choeropsis liberiensis
- play cat and mouse — Also called cat and rat. a children's game in which players in a circle keep a player from moving into or out of the circle and permit a second player to move into or out of the circle to escape the pursuing first player.
- population density — ratio: inhabitants to area
- post-revolutionary — of, pertaining to, characterized by, or of the nature of a revolution, or a sudden, complete, or marked change: a revolutionary junta.
- potassium myronate — sinigrin.
- programme of study — the prescribed syllabus that pupils must be taught at each key stage in the National Curriculum
- property insurance — insurance coverage for land and housing
- pseudo-symptomatic — pertaining to a symptom or symptoms.
- psychotherapeutics — psychotherapy.
- pygmy hippopotamus — a small hippopotamus, Choeropsis liberiensis, of forests and swamps in western Africa.
- pyramus and thisbe — (in Greek legend) two lovers of Babylon: Pyramus, wrongly supposing Thisbe to be dead, killed himself and she, encountering him in his death throes, did the same
- quality of service — (communications, networking) (QoS) The performance properties of a network service, possibly including throughput, transit delay, priority. Some protocols allow packets or streams to include QoS requirements.
- quantity surveying — the action or profession of a person who estimates the cost of the materials and labour necessary for a construction job
- quasi-metaphysical — pertaining to or of the nature of metaphysics.
- radius of gyration — the distance from an axis at which the mass of a body may be assumed to be concentrated and at which the moment of inertia will be equal to the moment of inertia of the actual mass about the axis, equal to the square root of the quotient of the moment of inertia and the mass.
- rear its ugly head — the upper part of the body in humans, joined to the trunk by the neck, containing the brain, eyes, ears, nose, and mouth.
- reduction strategy — (theory) An algorithm for deciding which redex(es) to reduce next. Different strategies have different termination properties in the presence of recursive functions or values. See string reduction, normal order reduction, applicative order reduction, parallel reduction
- reinsurance treaty — A reinsurance treaty is a contract that defines the terms of reinsurance business.
- repayment schedule — a document detailing the specific terms of a borrower's loan, such as monthly payment, interest rate, due dates etc
- revolutionary wars — American Revolution.
- safety regulations — regulations or rules that are put in place to ensure a product, event, etc, is safe and not dangerous
- schwarz inequality — Also called Cauchy's inequality. the theorem that the inner product of two vectors is less than or equal to the product of the magnitudes of the vectors.
- secondary industry — manufacturing, services, etc.
- securities analyst — an expert who advises on investment in securities such as stocks, shares and bonds
- security agreement — business: contract
- security clearance — access to top secret information
- shugart technology — Seagate Technology
- sodium thiocyanate — a white powder or colorless, deliquescent crystals, NaSCN, used chiefly in organic synthesis and in medicine in the treatment of hypertension.
- sound and the fury — a novel (1929) by William Faulkner.
- southeast by south — a point on the compass 11°15′ south of southeast. Abbreviation: SEbS.
- spare-part surgery — surgical replacement of defective or damaged organs by transplant or insertion of artificial devices
- statutory sick pay — the pay an employee is legally entitled to when sick
- structural geology — the branch of geology dealing with the structure and distribution of the rocks that make up the crust of the earth. Also called tectonics. Compare structure (def 7a).
- study hall teacher — a teacher who supervises or helps students during a period of time or lesson used for studying
- super royal octavo — a book size, 63⁄4 by 101⁄4 inches
- super royal quarto — a book size, 101⁄4 by 131⁄2 inches
- supportive therapy — any treatment, such as the intravenous administration of certain fluids, designed to reinforce or sustain the physiological well-being of a patient
- tertiary structure — the way in which the helixes or beta structures of a polypeptide are folded or arranged into a three-dimensional configuration.
- testamentary trust — a trust set up under the terms of a will.
- to feast your eyes — If you feast your eyes on something, you look at it for a long time with great attention because you find it very attractive.