17-letter words containing h, a, i, r, y
- respiratory chain — a series of mitochondrial proteins that transport electrons of hydrogen, released in the Krebs cycle, from acetyl coenzyme A to inhaled oxygen to form H 2 O: the energy released in the process is conserved as ATP.
- reticulate python — a python, Python reticulatus, of southeastern Asia and the East Indies, sometimes growing to a length of 32 feet (10 meters): usually considered to be the largest snake in the world.
- rich site summary — (web, standard) (RSS, blog, feed) A family of standard web document types containing regularly updated, short articles or news items. RSS documents (generally called "RSS feeds", "news feeds" or just "feeds") can be read with an RSS reader like BottomFeeder or Feedly. These are sometimes called "aggregators" because they combine multiple RSS feeds which the user can browse as a single list. The RSS reader tracks which articles the use has read, and is typically set to show only new articles, hence the idea of a "feed" or flow of new items. Most RSS feeds are based on RDF. RDF is a structured document format for describing textual resources such as news articles available on the web. RSS originally stood for "RDF Site Summary" as it was designed to provide short descriptions of (changes to) a website. Because it provides a standard way to deliver, or "syndicate", news or updates from one site to another, RSS is sometimes expanded as "Really Simple Syndication". It is closely associated with blogs, most of which provide an RSS feed of articles.
- sister of charity — a member of one of several congregations of sisters founded in 1634 by St. Vincent de Paul.
- spherical polygon — a closed figure formed by arcs of great circles on a spherical surface.
- spiny-headed worm — any of a small group of endoparasites of the phylum Acanthocephala, as larvae parasitic in insects and crustaceans and as adults in various vertebrates.
- statutory holiday — a public holiday; a holiday all workers are entitled to
- stereolithography — a process for creating three-dimensional objects using a computer-controlled laser to build up the required structure, layer by layer, from a liquid photopolymer that solidifies.
- stymphalian birds — a flock of predacious birds of Arcadia that were driven away and killed by Hercules as one of his labors.
- synchronistically — coincidence in time; contemporaneousness; simultaneousness.
- tertiary syphilis — the third stage of syphilis, characterized by involvement of the internal organs, especially the brain, spinal cord, heart, and liver.
- the evil day/hour — If someone is putting off the evil day or the evil hour, they have to do something unpleasant and are trying to avoid doing it for as long as possible.
- the varsity match — a sporting fixture between Oxford and Cambridge university rugby teams
- thirty years' war — the war, often regarded as a series of wars (1618–48), in central Europe, initially involving a conflict between German Protestants and Catholics and later including political rivalries with France, Sweden, and Denmark opposing the Holy Roman Empire and Spain.
- to play with fire — If you say that someone is playing with fire, you mean that they are doing something dangerous that may result in great harm for them and cause many problems.
- trick photography — photography that creates an illusion
- unitary authority — (in the United Kingdom) a district administered by a single tier of local government, esp those districts of England that became administratively independent of the county councils in 1996–98
- varix lymphaticus — a similar condition affecting an artery or lymphatic vessel
- willow flycatcher — a North American flycatcher, Empidonax alnorum, of alder thickets and other moist areas, that has greenish-brown upper parts and whitish underparts and is almost indistinguishable except by voice from E. traillii (willow flycatcher)
- youth programming — the creation and scheduling of television programmes specifically aimed at young people
- zoogeographically — In a zoogeographical way.