21-letter words containing p, e, r, f
- step-down transformer — a device that transfers an alternating current from one circuit to one or more other circuits with a decrease of voltage
- sun protection factor — SPF.
- supplementary benefit — (formerly) an extra amount of money that is paid to someone by the government, in addition to their normal income. Replaced by income support in 1988
- surface of projection — the surface upon which an image or a set of points is projected.
- sweet spirit of nitre — ethyl nitrite spirit.
- the acting profession — actors considered as a group
- the apple of your eye — If you say that someone is the apple of your eye, you mean that they are very important to you and you are extremely fond of them.
- the cream of the crop — You can refer to the best people or things of a particular kind as the cream of the crop.
- the end of one's rope — the end of one's endurance, resources, etc.
- the oldest profession — prostitution
- the origin of species — (On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life) a treatise (1859) by Charles Darwin setting forth his theory of evolution.
- the shipping forecast — a radio broadcast made by the BBC of weather reports and forecasts for the seas around the British Isles
- the supreme sacrifice — the sacrifice of one's life
- theater of operations — the part of the theater of war, including a combat zone and a communications zone, that is engaged in military operations and their support.
- to fall into the trap — If someone falls into the trap of doing something, they think or behave in a way which is not wise or sensible.
- to shoot from the hip — If you say that someone shoots from the hip or fires from the hip, you mean that they react to situations or give their opinion very quickly, without stopping to think.
- topgallant forecastle — a partial weather deck on top of a forecastle superstructure; forecastle deck.
- tripartite and fretty — (of a cross) having the limbs divided into three longitudinal strips each, intermingled in the manner of those in a cross parted and fretty.
- whip-and-tongue graft — a graft prepared by cutting both the scion and the stock in a sloping direction and inserting a tongue in the scion into a slit in the stock.
- wildlife photographer — someone that specializes in taking photographs of wild animals, especially in their natural habitats, and plants
- writ of habeas corpus — law: petition for hearing
- xfree86 project, inc. — (operating system, graphics) A non-profit organisation that produces XFree86, a freely redistributable implementation of the X Window System that runs on Unix and Unix-like operating systems and OS/2. The XFree86 Project has traditionally focused on Intel x86 based platforms (hence the "86"), but the current release supports other platforms.