15-letter words containing f, e, r, o
- a heart of gold — If you say that someone has a heart of gold, you are emphasizing that they are very good and kind to other people.
- a small fortune — a very high price or cost
- accessory fruit — a fruit having enlarged accessory structures in addition to those formed from the ovary, as the strawberry, in which the fleshy tissue is the enlarged receptacle and the true fruits are the small, dry achenes borne on its surface
- act of congress — a law that has been passed by both houses of the US Congress and signed by the president; if the president has chosen to veto the bill, it can be passed by a two-thirds majority in Congress
- adhesive factor — the ratio of the force that can be exerted on driving wheels with full traction to the weight on the driving wheels, usually expressed as a percentage.
- affaire d'amour — a love affair
- affine geometry — the branch of geometry dealing with affine transformations.
- after a fashion — If you say that something was done after a fashion, you mean that it was done, but not very well.
- afternoon watch — the watch from noon until 4 p.m.
- age of aquarius — an astrological era believed to bring increased spirituality and harmony on earth.
- agree to differ — to end an argument amicably while maintaining differences of opinion
- air force cross — a U.S. Air Force decoration awarded for extraordinary heroism in action
- algebra of sets — a nonempty collection of sets having the property that the union of two sets of the collection is a set of the collection and the complement of each set of the collection is a set in the collection.
- altar of repose — a pedestal or niche upon which the sacraments are preserved from Maundy Thursday to Good Friday.
- andrew of crete — a.d. c650–730, Greek poet and Orthodox archbishop of Crete.
- anfractuosities — Plural form of anfractuosity.
- angle of repose — the maximum angle to the horizontal at which rocks, soil, etc, will remain without sliding
- anne of austria — 1601–66, wife of Louis XIII of France and daughter of Philip III of Spain: regent of France (1643–61) for her son Louis XIV
- anne of denmark — 1574–1619, wife (from 1589) of James I of England and VI of Scotland
- antiferromagnet — a material which exhibits antiferromagnetism
- antiforeclosure — opposed to the process of foreclosure
- army air forces — a unit comprising almost all aviation, with its personnel, equipment, etc.: it became part of the Air Force on July 26, 1947.
- articles of war — the disciplinary and legal procedures by which the naval and military forces of Great Britain were bound before the 19th century
- at the mercy of — in the power of
- audio frequency — a frequency in the range 20 hertz to 20 000 hertz. A sound wave of this frequency would be audible to the human ear
- autofluorescent — Of, pertaining to, or exhibiting autofluorescence.
- automatic rifle — a type of light machine gun capable of firing automatically or in single shots.
- autotransformer — a transformer in which part of the winding is common to both primary and secondary circuits
- azobisformamide — (chemistry) azodicarbonamide.
- backup software — (tool, software) Software for doing a backup, often included as part of the operating system. Backup software should provide ways to specify what files get backed up and to where. It may include its own scheduling function to automate the procedure or, preferably, work with generic scheduling facilities. It may include facilities for managing the backup media (e.g. maintaining an index of tapes) and for restoring files from backups. Examples are Unix's dump command and Windows's ntbackup.
- bandstop filter — A bandstop filter is a filter designed to eliminate all frequencies within a band of frequencies.
- baptism of fire — If someone who has just begun a new job has a baptism of fire, they immediately have to cope with very many severe difficulties and obstacles.
- barefoot doctor — (esp in developing countries) a worker trained as a medical auxiliary in a rural area who dispenses medicine, gives first aid, assists at childbirth, etc
- be delivered of — to give birth to
- be spoiling for — to have an aggressive desire for (a fight, etc)
- beast of burden — A beast of burden is an animal such as an ox or a donkey that is used for carrying or pulling things.
- bedford heights — a town in N Ohio.
- beef stroganoff — a dish of thin strips of beef cooked with onions, mushrooms, and seasonings, served in a sour-cream sauce
- beet leafhopper — a small leafhopper (Circulifer tenellus) that transmits a very destructive virus to sugar beets
- before the fact — before the commission of the offence
- before the mast — as an apprentice seaman
- before the wind — with the wind coming from astern
- belgian griffon — one of a variety of the Brussels griffon having a black or reddish-brown and black coat.
- belief revision — (artificial intelligence) The area of theory change in which preservation of the information in the theory to be changed plays a key role. A fundamental issue in belief revision is how to decide what information to retract in order to maintain consistency, when the addition of a new belief to a theory would make it inconsistent. Usually, an ordering on the sentences of the theory is used to determine priorities among sentences, so that those with lower priority can be retracted. This ordering can be difficult to generate and maintain. The postulates of the AGM Theory for Belief Revision describe minimal properties a revision process should have.
- benefit concert — a concert to raise money for charity
- benzyl fluoride — a colorless liquid, C 7 H 7 F, used in organic synthesis.
- bird of passage — If you refer to someone as a bird of passage, you mean that they are staying in a place for a short time before going to another place.
- board of health — an agency with responsibility for health in state, country, etc
- board of parole — an agency that determines which prisoners are to be released on parole
- board-certified — A doctor who is board-certified has passed tests and meets the standards of a board of specialists in their area of medicine.
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