23-letter words containing a, c, h, y
- pharmaceuticals company — a company specialising in developing and marketing pharmaceuticals
- phyletic classification — classification of organisms based on their assumed evolutionary histories and relationships.
- physical memory address — physical address
- physiological phonetics — the branch of phonetics that deals with the motive processes, anatomical measurements, spirometric properties, muscle and membrane tone, and kinetic aspects of the production of speech and with related aspects of the reception of speech.
- polymethyl methacrylate — polymerized methyl methacrylate.
- process hazard analysis — Process hazard analysis is calculating what might be a hazard in a process, how likely it is to happen, and what should be done if someone or something is exposed to this hazard.
- psychomotor retardation — a generalized slowing of psychological and physical activity, frequently occurring as a symptom of severe depression.
- public-key cryptography — public-key encryption
- right circular cylinder — a cylinder generated by the revolution of a rectangle about one of its sides.
- schematic type variable — generic type variable
- schizotypal personality — a personality disorder characterized by a group of symptoms similar to but less severe than schizophrenia, as odd behavior, peculiar thinking, and social isolation.
- scottish national party — a political party advocating the independence of Scotland, founded in 1934
- secondary modern school — (formerly) a secondary school offering a more technical or practical and less academic education than a grammar school
- secondary seventh chord — a chord formed by superposition of three thirds upon any degree of the scale except the dominant.
- secondary sex character — any of a number of manifestations, as development of breasts or beard, muscularity, distribution of fat tissue, and change of pitch in voice, specific to each sex and incipient at puberty but not essential to reproduction.
- site catchment analysis — the examination by survey, excavation, maps, and graphs of a contained area to evaluate the productivity of the resources customarily exploited by the inhabitants of a settlement, especially a prehistoric one.
- structural anthropology — a school of anthropology founded by Claude Lévi-Strauss and based loosely on the principles of structural linguistics.
- thank one's lucky stars — any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night.
- the library of congress — the official library of the United States in Washington, DC. It houses extensive collections in all subject areas and formats, important historical documents, and is also a depository for copyrighted materials.
- the yachting fraternity — the social circle of well-off people who sail yachts
- to stick in your throat — If something sticks in your throat, you find it unacceptable.
- to your heart's content — as much as you please
- ventricular tachycardia — a cardiac arrhythmia in which the muscles of the ventricles contract irregularly in a rapid, uncoordinated manner, impairing the normal pumping of blood.
- white-coat hypertension — the phenomenon of having elevated blood pressure only during a medical consultation
- yellow-headed blackbird — a North American blackbird, Xanthocephalus xanthocephalus, having a yellow head.
- you can't go home again — a novel (1940) by Thomas Wolfe.