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18-letter words containing t, y, s, i, e

  • peter tschaikowsky — Peter Ilyich [il-yich] /ˈɪl yɪtʃ/ (Show IPA), Tchaikovsky, Peter Ilyich.
  • phanerocrystalline — (of a rock) having the principal constituents in the form of crystals visible to the naked eye.
  • phase-shift keying — (communications)   (PSK) A digital modulation scheme that conveys data by changing the phase of a carrier wave. The data can either determine the absolute phase relative to the unmodulated carrier or reference signal ("coherent phase-shift keying", CPSK) or the change in phase ("differential phase-shift keying", DPSK). The number of different phases used determines the amount of data that can be transmitted in each cycle. Each cycle can be considered to constitute one "symbol", e.g. with two possible phases, each cycle carries one bit. The more phases that are used, the less tollerant to noise the transmissions becomes. Alternatives to PSK are amplitude-shift keying (ASK) and frequency-shift keying (FSK).
  • phosphatidylserine — any of a class of phospholipids occurring in biological membranes and fats
  • physical chemistry — the branch of chemistry dealing with the relations between the physical properties of substances and their chemical composition and transformations.
  • physical education — systematic instruction in sports, exercises, and hygiene given as part of a school or college program.
  • physical inventory — To carry out a physical inventory is to count all the stock on hand.
  • physical therapist — sb who performs physiotherapy
  • point set topology — topology (def 2).
  • polynesian tattler — a sandpiper, H. incanus, native to the Pacific coastal regions
  • population density — ratio: inhabitants to area
  • positively charged — having a positive charge
  • post-revolutionary — of, pertaining to, characterized by, or of the nature of a revolution, or a sudden, complete, or marked change: a revolutionary junta.
  • postviral syndrome — debilitating condition occurring as a sequel to viral illness
  • potassium myronate — sinigrin.
  • presentation layer — (networking)   The second highest layer (layer 6) in the OSI seven layer model. Performs functions such as text compression, code or format conversion to try to smooth out differences between hosts. Allows incompatible processes in the application layer to communicate via the session layer. Documents: ITU Rec. X.226 (ISO 8823), ITU Rec. X.216 (ISO 8822).
  • priority inversion — (parallel)   The state of a concurrent system where a high priority task is waiting for a low priority task which is waiting for a medium priority task. The system may become unstable and crash under these circumstances. In an operating system that uses multiple tasks, each task (or context) may be given a priority. These priorities help the scheduler decide which task to run next. Consider tasks, L, M, and H, with priorities Low, Medium, and High. M is running and H is blocked waiting for some resource that is held by L. So long as any task with a priority higher than L is runable, it will prevent task L, and thus task H, from running. Priority inversion is generally considered either as a high-level design failure or an implementation issue to be taken into account depending on who is talking. Most operating systems have methods in place to prevent or take inversion into account. Priority inheritance is one method. The most public instance of priority inversion is the repeated 'fail-safe' rebooting of the Mars Pathfinder. base station ('Sagan Memorial Station').
  • processionary moth — a moth of the family Thaumetopoeidae, esp the oak processionary moth (Thaumetopoea processionea), the larvae of which leave the communal shelter nightly for food in a V-shaped procession
  • property insurance — insurance coverage for land and housing
  • proprietary rights — rights of ownership
  • protective custody — detention of a person by the police solely as protection against a possible attack or reprisal by someone.
  • pseudo-symptomatic — pertaining to a symptom or symptoms.
  • psychotechnologist — a specialist in psychotechnology
  • psychotherapeutics — psychotherapy.
  • 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.
  • queen's university — A Canadian University. Source of GVL, NIAL, Pasqual, Q'NIAL and TXL.
  • range of stability — the angle to the perpendicular through which a vessel may be heeled without losing the ability to right itself.
  • 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
  • reflection density — a measure of the extent to which a surface reflects light or other electromagnetic radiation, equal to the logarithm to base ten of the reciprocal of the reflectance
  • registered charity — official aid organization
  • registered company — a company which has officially registered its business
  • reinsurance treaty — A reinsurance treaty is a contract that defines the terms of reinsurance business.
  • respiratory arrest — cessation of breathing
  • respiratory system — the system by which oxygen is taken into the body and an exchange of oxygen and carbon dioxide takes place; in mammals the system includes the nasal passages, pharynx, trachea, bronchi, and lungs.
  • restoration comedy — English comedy of the period of the Restoration, stressing manners and social satire.
  • restriction enzyme — any of a group of enzymes that catalyze the cleavage of DNA molecules at specific sites: used for gene splicing in recombinant DNA technology and for chromosome mapping.
  • revolutionary wars — American Revolution.
  • rotary clothesline — an apparatus of radiating spokes that support lines on which clothes are hung to dry
  • safety regulations — regulations or rules that are put in place to ensure a product, event, etc, is safe and not dangerous
  • safety-deposit box — a lockable metal box or drawer, especially in a bank vault, used for safely storing valuable papers, jewelry, etc.
  • saint george's day — April 23, celebrated in parts of the British Commonwealth in honor of the patron saint of Britain and especially in New Zealand as a bank holiday.
  • 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.
  • science dictionary — a specialized dictionary covering terms in the life, earth, and physical sciences, such as the online Science Dictionary on Dictionary.com. A science dictionary includes many technical terms with precise, specialized meanings—terms not normally found in general dictionaries—making it an invaluable resource for students and professionals in scientific fields.
  • scottish secretary — the Secretary of State for Scotland, head of the Scotland Office, a UK government department with responsibility for some Scottish affairs
  • secondary industry — manufacturing, services, etc.
  • secretarial agency — a recruiting business which deals with jobs for secretaries
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