18-letter words containing h, a, i, f

paper handkerchief — a handkerchief made from tissue paper
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).
purchasing officer — the member of staff in an organization who is responsible for buying goods or products
quick off the mark — If you are quick off the mark, you are quick to understand or respond to something. If you are slow off the mark, you are slow to understand or respond to something.
resistance fighter — someone who fights (for freedom, etc) against an invader in an occupied country, or against their government, etc, often secretly or illegally
richard p. feynman — (person, computing, architecture) /fayn'mn/ 1918-1988. A US physicist, computer scientist and author who graduated from Massachusetts Institute of Technology and Princeton. Feynmane was a key figure in helping Oppenheimer and team develop atomic bomb. In 1950 he became a professor at Caltech and in 1965 became Nobel Prize Laureate in Physics for QED (quantum electrodynamics). He was a primary figure in "solving" the Challenger disaster O-ring problem. He "rediscovered" the former Soviet Socialist Republic of Tuva. The 2001 film "Infinity" about Feynman's early life featured Matthew Broderick and Patricia Arquette. In 2001, "QED", a play about Feynman's life featuring Alan Alda opened.
saint peter's fish — another name for tilapia, taken from a Bible story about Saint Peter catching a fish with a coin in its mouth
schofield barracks — a town on central Oahu, in central Hawaii.
school certificate — (in England and Wales between 1917 and 1951 and currently in New Zealand) a certificate awarded to school pupils who pass a public examination: the equivalent of GCSE
scottish blackface — a common breed of hardy mountain sheep having horns and a black face, kept chiefly on the mainland of Scotland
sign of the zodiac — one of the twelve constellations along the path of the ecliptic.
sit at the feet of — to be an admiring disciple of
sodium thiosulfate — a white, crystalline, water-soluble powder, Na 2 S 2 O 3 ⋅5H 2 O, used as a bleach and in photography as a fixing agent.
soft touch sealing — Soft touch sealing is a copolymer seal for a tank, with characteristics designed for softness, used instead of a metal seal to help avoid fire when sparks are generated.
solid-fuel heating — heating that uses solid fuel, such as coal or coke
state of the union — A State of the Union speech or address is a speech, given once a year, in which the president of the United States talks about the current political issues that affect the country as a whole and about his plans for the year ahead.
sub-saharan africa — the region of Africa to the south of the Sahara desert
sulfuric anhydride — sulfur trioxide.
sutton-in-ashfield — a market town in N central England, in W Nottinghamshire. Pop: 41 951 (2001)
talk of the devil! — used when an absent person who has been the subject of conversation appears
the beautiful game — football
the bird has flown — the person in question has fled or escaped
the family compact — the ruling oligarchy in Upper Canada in the early 19th century
the final solution — the code name used by the Nazis to refer to the plan of mass murder of the Jews
the first sea lord — the senior of the two serving naval officers who sits on the admiralty board of the Ministry of Defence
the french riviera — the Mediterranean coastal region of France from Cannes eastward to Italy
the hand of fatima — a symbol of a hand used in some Arabic countries to protect against the evil eye, a magical power
thermal efficiency — the ratio of the work output of a heat engine to the heat input expressed in the same units of energy.
thorfinn karlsefni — 980–after 1007, Icelandic navigator, explorer, and leader of early colonizing expedition to Vinland, in North America.
to be said for sth — If you say there is a lot to be said for something, you mean you think it has a lot of good qualities or aspects.
to find fault with — If you find fault with something or someone, you look for mistakes and complain about them.
transmission shaft — a shaft that rotates transmitting motion from the engine to the differential gear
under the aegis of — guided or protected by
unification church — a religious sect that combines elements of Protestantism and Buddhism, founded by the Rev. Sun Myung Moon in 1954: many of its members live in communes sponsored by the sect.
water of hydration — the portion of a hydrate that is represented as, or can be expelled as, water: now usually regarded as being in true molecular combination with the other atoms of the compound, and not existing in the compound as water.
white-faced hornet — any large, stinging paper wasp of the family Vespidae, as Vespa crabro (giant hornet) introduced into the U.S. from Europe, or Vespula maculata (bald-faced hornet or white-faced hornet) of North America.
whitewater rafting — the sport of rafting down fast-flowing rivers, esp over rapids
witch hazel family — the plant family Hamamelidaceae, characterized by trees and shrubs having alternate, simple leaves, flowers in clusters or heads, and fruit in the form of a double-beaked woody capsule, and including the sweet gum, witch alder, and witch hazel.
writ of attachment — a document by which a court orders the seizing of property in order to ensure satisfaction of a judgement
xenon hexafluoride — a colorless, crystalline compound, XeF 6 , that melts at 50°C to a yellow liquid, and boils at 75°C.

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